diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..b512c09d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules
\ No newline at end of file
diff --git a/README.md b/README.md
index 4ac8bbff..7df9e455 100644
--- a/README.md
+++ b/README.md
@@ -1,61 +1,11 @@
-Assignment 4 - Creative Coding: Interactive Multimedia Experiences
-===
+## Tree Generator
 
-Due: October 4th, by 11:59 AM.
+Heroku Link: https://treegen.herokuapp.com
 
-For this assignment we will focus on client-side development using popular audio/graphics/visualization technologies. The goal of this assignment is to refine our JavaScript knowledge while exploring the multimedia capabilities of the browser.
+I made a tree generator. It uses a canvas element to draw a tree using recursion and some random parameters. The user is able to tweak these parameters to create different trees.
 
-[WebAudio + Canvas Tutorial](https://github.com/cs4241-22a/cs4241-22a.github.io/blob/main/using_webaudio_canvas.md)  
-[SVG + D3 tutorial](https://github.com/cs4241-21a/cs4241-21a.github.io/blob/main/using_svg_and_d3.md)  
+The hardest part of the project was connecting all of the parameters from the GUI to the canvas.
 
-Baseline Requirements
----
+Instructions are on the page.
 
-Your application is required to implement the following functionalities:
-
-- A server created using Express. This server can be as simple as needed.
-- A client-side interactive experience using at least one of the following web technologies frameworks.
-  - [Three.js](https://threejs.org/): A library for 3D graphics / VR experiences
-  - [D3.js](https://d3js.org): A library that is primarily used for interactive data visualizations
-  - [Canvas](https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API): A 2D raster drawing API included in all modern browsers
-  - [SVG](https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API): A 2D vector drawing framework that enables shapes to be defined via XML.
-  - [Web Audio API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API): An API for audio synthesis, analysis, processing, and file playback.
-- A user interface for interaction with your project, which must expose at least four parameters for user control. [tweakpane](https://cocopon.github.io/tweakpane/) is highly recommended for this, but you can also use regular HTML `<input>` tags (the `range` type is useful to create sliders). You might also explore interaction by tracking mouse movement via the `window.onmousemove` event handler in tandem with the `event.clientX` and `event.clientY` properties. Consider using the [Pointer Events API](https://developer.mozilla.org/en-US/docs/Web/API/Pointer_events) to ensure that that both mouse and touch events will both be supported in your app.
-- Your application should display basic documentation for the user interface when the application first loads.
-
-The interactive experience should possess a reasonable level of complexity. Some examples:
-### Three.js
-- A generative algorithm creates simple agents that move through a virtual world. Your interface controls the behavior / appearance of these agents.
-- A simple 3D game... you really want this to be a simple as possible or it will be outside the scope of this assignment.
-- An 3D audio visualization of a song of your choosing. User interaction should control aspects of the visualization. 
-### Canvas
-- Implement a generative algorithm such as [Conway's Game of Life](https://bitstorm.org/gameoflife/) (or 1D cellular automata) and provide interactive controls. Note that the Game of Life has been created by 100s of people using <canvas>; we'll be checking to ensure that your implementation is not a copy of these.
-- Design a 2D audio visualizer of a song of your choosing. User interaction should control visual aspects of the experience. 
-### Web Audio API
-- Create a screen-based musical instrument using the Web Audio API. You can use projects such as [Interface.js](http://charlie-roberts.com/interface/) or [Nexus UI](https://nexus-js.github.io/ui/api/#Piano) to provide common musical interface elements, or use dat.GUI in combination with mouse/touch events (use the Pointer Events API). Your GUI should enable users to control aspects of sound synthesis. If you want to use higher-level instruments instead of the raw WebAudio API sounds, consider trying the instruments provided by [Tone.js]() or [Gibber](https://github.com/charlieroberts/gibber.audio.lib).
-### D3.js
-- Create visualizations using the datasets found at [Awesome JSON Datasets](https://github.com/jdorfman/Awesome-JSON-Datasets). Experiment with providing different visualizations of the same data set, and providing users interactive control over visualization parameters and/or data filtering. Alternatively, create a single visualization with using one of the more complicated techniques shown at [d3js.org](d3js.org) and provide meaningful points of interaction for users.
-
-Deliverables
----
-
-Do the following to complete this assignment:
-
-1. Implement your project with the above requirements.
-3. Test your project to make sure that when someone goes to your main page on Glitch/Heroku/etc., it displays correctly.
-4. Ensure that your project has the proper naming scheme `a4-firstname-lastname` so we can find it.
-5. Fork this repository and modify the README to the specifications below. *NOTE: If you don't use Glitch for hosting (where we can see the files) then you must include all project files that you author in your repo for this assignment*.
-6. Create and submit a Pull Request to the original repo. Name the pull request using the following template: `a4-firstname-lastname`.
-
-Sample Readme (delete the above when you're ready to submit, and modify the below so with your links and descriptions)
----
-
-## Your Web Application Title
-
-your hosting link e.g. http://a4-charlieroberts.glitch.me
-
-Include a very brief summary of your project here. Images are encouraged when needed, along with concise, high-level text. Be sure to include:
-
-- the goal of the application
-- challenges you faced in realizing the application
-- the instructions you present in the website should be clear enough to use the application, but if you feel any need to provide additional instructions please do so here.
+If there is a crash, just refresh the page.
diff --git a/index.js b/index.js
new file mode 100644
index 00000000..b21a9bce
--- /dev/null
+++ b/index.js
@@ -0,0 +1,23 @@
+//make an express app
+const express = require("express");
+const app = express();
+const port = process.env.PORT;
+//set directory for static files
+app.use(express.static("public"));
+
+//make a route
+app.get("/", (req, res) => {
+  //send index.html
+  res.sendFile(__dirname + "/index.html");
+});
+
+//any other request, send the file
+app.get("*", (req, res) => {
+  console.log(req.url);
+  res.sendFile(__dirname + "/public" + req.url);
+});
+
+//start the server
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`);
+});
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 00000000..b5fe3eb6
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1029 @@
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+      "license": "ISC",
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+        "seedrandom": "^3.0.5"
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diff --git a/package.json b/package.json
new file mode 100644
index 00000000..24835df4
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "a4-creative-coding",
+  "version": "1.0.0",
+  "description": "Tree Generator",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/npollock1414/a4-creative-coding.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/npollock1414/a4-creative-coding/issues"
+  },
+  "homepage": "https://github.com/npollock1414/a4-creative-coding#readme",
+  "dependencies": {
+    "express": "^4.18.1",
+    "seedrandom": "^3.0.5"
+  }
+}
diff --git a/public/css/styles.css b/public/css/styles.css
new file mode 100644
index 00000000..6bac0ac4
--- /dev/null
+++ b/public/css/styles.css
@@ -0,0 +1,110 @@
+body {
+    background-color: #1a1a1a;
+}
+
+h1 {
+    text-align: center;
+    font-size: 50px;
+    font-family: 'Courier New', Courier, monospace;
+    color: white;
+    margin: 0px;
+}
+h2 {
+    margin: 0;
+}
+
+canvas {
+    border-style: groove;
+    border-width: 5px;
+    border-color: black;
+    background-color: white;
+    border-radius: 8px;
+}
+
+#main-group {
+    display: flex;
+    flex-direction: row;
+    justify-content: center;
+    align-items: center;
+    margin: 0 10px;
+
+}
+
+#settings {
+    display: flex;
+    flex-direction: column;
+    margin-right: 20px;
+    color: white;
+    width: 300px;
+}
+
+#presets {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    margin-right: 20px;
+    color: white;
+    max-width: 500px;
+}
+
+#settings>input {
+    margin-bottom: 5px;
+}
+
+#settings button {
+    margin-top: 10px;
+    width: 100%;
+    height: 40px;
+}
+
+
+
+#button-group {
+    display: flex;
+    flex-direction: row;
+    justify-content: space-between;
+}
+
+#generate {
+    background-color: aqua;
+    border-radius: 8px;
+    border-style: groove;
+    border-width: 2px;
+    border-color: black;
+    color: black;
+    background-image: linear-gradient(45deg, transparent 25%, rgba(0, 0, 0, 0.1) 25%, rgba(0, 0, 0, 0.1) 50%, transparent 50%, transparent 75%, rgba(0, 0, 0, 0.1) 75%, rgba(0, 0, 0, 0.1));
+}
+
+#generate:hover {
+    background-color: rgb(0, 153, 255);
+    
+}
+
+#checkbox-group {
+    display: flex;
+    flex-direction: row;
+    justify-content: space-evenly;
+    margin-top: 10px;
+    margin-bottom: 10px;
+}
+
+.tree-part {
+    display: flex;
+    flex-direction: row;
+    justify-content: baseline;
+    align-items: center;
+    margin-bottom: 5px;
+}
+
+#preset-buttons > img {
+    cursor: pointer;
+}
+
+#preset-buttons {
+    display: flex;
+    flex-direction: column;
+    justify-content: space-evenly;
+    margin-top: 10px;
+    margin-bottom: 10px;
+}
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 00000000..0363e806
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,196 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <script src="//cdnjs.cloudflare.com/ajax/libs/seedrandom/3.0.5/seedrandom.min.js"></script>
+    <link rel="stylesheet" href="./css/styles.css" />
+    <title>Tree Generator</title>
+  </head>
+
+  <body>
+    <h1>Tree Generator</h1>
+    <div id="main-group">
+      <div id="presets">
+        <h2 style="text-align: center">Presets</h2>
+        <p style="text-align: center">*May take time to render</p>
+        <div id="preset-buttons">
+          <img
+            id="preset1"
+            src="https://cdn.discordapp.com/attachments/1012552520415072318/1026736248582311998/renderedBasic.png"
+            alt="basic-scene"
+            width="200"
+          />
+          <img
+            id="preset2"
+            src="https://cdn.discordapp.com/attachments/1012552520415072318/1026751032065278022/treeScene.png"
+            alt="fractal tree"
+            width="200"
+          />
+          <img
+            id="preset3"
+            src="https://cdn.discordapp.com/attachments/1012552520415072318/1026752911696474153/redTrees.png"
+            alt="red trees"
+            width="200"
+          />
+          <img
+            id="preset4"
+            src="https://cdn.discordapp.com/attachments/1012552520415072318/1026754009022865428/greenTree.png"
+            alt="green tree"
+            width="200"
+          />
+        </div>
+      </div>
+      <div id="settings">
+        <h2 style="text-align: center">Settings</h2>
+        <label for="seed">Seed</label>
+        <input
+          type="number"
+          id="seed"
+          name="seed"
+          min="0"
+          max="1000000"
+          value="61"
+        />
+        <label for="startLength">Start Length</label>
+        <output for="startLength" id="startLengthOutput">100</output>
+        <input
+          type="range"
+          id="startLength"
+          name="startLength"
+          min="50"
+          max="200"
+          value="100"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="lenCoeff">Length Coefficient</label>
+        <output for="lenCoeff" id="lenCoeffOutput">0.8</output>
+        <input
+          type="range"
+          id="lenCoeff"
+          name="lenCoeff"
+          min="0.5"
+          max="0.9"
+          step="0.01"
+          value="0.8"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="lenStd">Length Standard Deviation</label>
+        <output for="lenStd" id="lenStdOutput">0.05</output>
+        <input
+          type="range"
+          id="lenStd"
+          name="lenStd"
+          min="0"
+          max="0.1"
+          step="0.01"
+          value="0.05"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="startWidth">Start Width</label>
+        <output for="startWidth" id="startWidthOutput">10</output>
+        <input
+          type="range"
+          id="startWidth"
+          name="startWidth"
+          min="5"
+          max="20"
+          value="10"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="widthCoeff">Width Coefficient</label>
+        <output for="widthCoeff" id="widthCoeffOutput">0.8</output>
+        <input
+          type="range"
+          id="widthCoeff"
+          name="widthCoeff"
+          min="0.5"
+          max="0.9"
+          step="0.01"
+          value="0.8"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="widthStd">Width Standard Deviation</label>
+        <output for="widthStd" id="widthStdOutput">0.05</output>
+        <input
+          type="range"
+          id="widthStd"
+          name="widthStd"
+          min="0"
+          max="0.1"
+          step="0.01"
+          value="0.05"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="angleCoeff">Angle Coefficient</label>
+        <output for="angleCoeff" id="angleCoeffOutput">0.75</output>
+        <input
+          type="range"
+          id="angleCoeff"
+          name="angleCoeff"
+          min="0.4"
+          max="1.5"
+          step="0.01"
+          value="0.75"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="angleStd">Angle Standard Deviation</label>
+        <output for="angleStd" id="angleStdOutput">0.2</output>
+        <input
+          type="range"
+          id="angleStd"
+          name="angleStd"
+          min="0"
+          max="0.4"
+          step="0.01"
+          value="0.2"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <label for="numTrees">Number of Trees</label>
+        <output for="numTrees" id="numTreesOutput">3</output>
+        <input
+          type="range"
+          id="numTrees"
+          name="numTrees"
+          min="1"
+          max="5"
+          value="3"
+          oninput="this.previousElementSibling.value = this.value"
+        />
+        <div class="tree-part">
+          <label for="leaves" style="display: block">Leaves</label>
+          <input type="checkbox" id="leaves" name="leaves" checked />
+          <input type="color" id="leafColor" name="leafColor" value="#00ff00" />
+        </div>
+        <div class="tree-part">
+          <label for="background" style="display: block">Background</label>
+          <input type="checkbox" id="background" name="background" checked />
+          <input
+            type="color"
+            id="backgroundColor"
+            name="backgroundColor"
+            value="#000000"
+          />
+        </div>
+        <div class="tree-part">
+          <label for="branchColor" style="display: block">Branch Color</label>
+          <input
+            type="color"
+            id="branchColor"
+            name="branchColor"
+            value="#663300"
+          />
+        </div>
+        <div id="button-group">
+          <button id="reset">Reset</button>
+          <button id="generate">Fancy Render</button>
+          <button id="download">Download</button>
+        </div>
+        <p id="help-pane"></p>
+      </div>
+      <canvas id="game"></canvas>
+      <script src="js/game.js"></script>
+    </div>
+  </body>
+</html>
diff --git a/public/js/game.js b/public/js/game.js
new file mode 100644
index 00000000..b609fa7c
--- /dev/null
+++ b/public/js/game.js
@@ -0,0 +1,621 @@
+let canvas, ctx;
+let lenCoeff = 0.8;
+let widthCoeff = 0.8;
+let angleCoeff = 0.75;
+let angleStd = 0.2;
+let lenStd = 0.05;
+let widthStd = 0.05;
+let startWidth = 10;
+let startLength = 100;
+let seed = 61;
+let numTrees = 3;
+let trees = [];
+let drawShadows = false;
+let branchColor = "#4d2806";
+let leafColor = "green";
+let doDrawLeaves = true;
+let doDrawBackground = true;
+let backgroundColor = "black";
+const defaultHelpText = "Hover over a slider to see its description";
+
+class Point {
+  constructor(x, y) {
+    this.x = x;
+    this.y = y;
+  }
+}
+
+let moonLoc = new Point(100, 100);
+
+window.onload = function () {
+  //get the canvas element
+  canvas = document.getElementById("game");
+  //get the 2d context
+  ctx = canvas.getContext("2d");
+  //set the canvas width and height
+  canvas.width = 1200;
+  canvas.height = 800;
+
+  const renderScene = () => {
+    console.time("render");
+    trees = [];
+    Math.seedrandom(seed);
+    resetBackground();
+    genTrees();
+    drawTrees();
+    drawFog();
+    console.timeEnd("render");
+  };
+
+  let helpPane = window.document.getElementById("help-pane");
+  //on hover for any of the sliders, show a message in the help pane
+  helpPane.innerHTML = defaultHelpText;
+
+  //set on input listeners
+  let seedElt = window.document.getElementById("seed");
+
+  let fancyRender = window.document.getElementById("generate");
+  fancyRender.addEventListener("click", () => {
+    drawShadows = true;
+    renderScene();
+    drawShadows = false;
+  });
+
+  fancyRender.addEventListener("mouseover", () => {
+    helpPane.innerHTML = "Over 1 sec/tree to render with shadows.";
+  });
+
+  fancyRender.addEventListener("mouseout", () => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let branchColorElt = window.document.getElementById("branchColor");
+  branchColorElt.addEventListener("input", (e) => {
+    branchColor = e.target.value;
+    renderScene();
+  });
+
+  branchColorElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Change the color of the branches";
+  });
+
+  branchColorElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let leafColorElt = window.document.getElementById("leafColor");
+  leafColorElt.addEventListener("input", (e) => {
+    leafColor = e.target.value;
+    renderScene();
+  });
+
+  leafColorElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Change the color of the leaves";
+  });
+
+  leafColorElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let leavesElt = window.document.getElementById("leaves");
+  leavesElt.addEventListener("input", (e) => {
+    //check if the checkbox is checked
+    doDrawLeaves = e.target.checked;
+    renderScene();
+  });
+
+  leavesElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Toggle leaves on and off";
+  });
+
+  leavesElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let downloadButton = window.document.getElementById("download");
+  downloadButton.addEventListener("click", () => {
+    //download the canvas as an image
+    let link = document.createElement("a");
+    link.download = "treeScene.png";
+    link.href = canvas.toDataURL();
+    link.click();
+  });
+
+  downloadButton.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Download the scene as an image";
+  });
+
+  downloadButton.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let startLengthElt = window.document.getElementById("startLength");
+  startLengthElt.addEventListener("input", (e) => {
+    startLength = e.target.value;
+    renderScene();
+  });
+
+  startLengthElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Change the length of the first branch";
+  });
+
+  startLengthElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let lenCoeffElt = window.document.getElementById("lenCoeff");
+  lenCoeffElt.addEventListener("input", (e) => {
+    console.log(lenCoeff);
+    //parse the value as a float
+    lenCoeff = parseFloat(e.target.value);
+    console.log(lenCoeff);
+    renderScene();
+  });
+
+  lenCoeffElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Change the length coefficient";
+  });
+
+  lenCoeffElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let lenStdElt = window.document.getElementById("lenStd");
+  lenStdElt.addEventListener("input", (e) => {
+    lenStd = parseFloat(e.target.value);
+    renderScene();
+  });
+
+  lenStdElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Change the length standard deviation";
+  });
+
+  lenStdElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let widthElt = window.document.getElementById("startWidth");
+  widthElt.addEventListener("input", (e) => {
+    startWidth = parseFloat(e.target.value);
+    renderScene();
+  });
+
+  widthElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Change the width of the first branch";
+  });
+
+  widthElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let widthCoeffElt = window.document.getElementById("widthCoeff");
+  widthCoeffElt.addEventListener("input", (e) => {
+    widthCoeff = parseFloat(e.target.value);
+    renderScene();
+  });
+
+  widthCoeffElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Mean multiplier for a new branch's width";
+  });
+
+  widthCoeffElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let widthStdElt = window.document.getElementById("widthStd");
+  widthStdElt.addEventListener("input", (e) => {
+    widthStd = parseFloat(e.target.value);
+    renderScene();
+  });
+
+  widthStdElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Standard deviation for a new branch's width";
+  });
+
+  widthStdElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let angleCoeffElt = window.document.getElementById("angleCoeff");
+  angleCoeffElt.addEventListener("input", (e) => {
+    angleCoeff = parseFloat(e.target.value);
+    renderScene();
+  });
+
+  angleCoeffElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Mean change in a new branch's angle";
+  });
+
+  angleCoeffElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let angleStdElt = window.document.getElementById("angleStd");
+  angleStdElt.addEventListener("input", (e) => {
+    angleStd = parseFloat(e.target.value);
+    renderScene();
+  });
+
+  angleStdElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Standard deviation for a new branch's angle";
+  });
+
+  angleStdElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let numTreesElt = window.document.getElementById("numTrees");
+  numTreesElt.addEventListener("input", (e) => {
+    numTrees = parseInt(e.target.value);
+    renderScene();
+  });
+
+  numTreesElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Number of trees to draw";
+  });
+
+  numTreesElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  seedElt.oninput = (event) => {
+    seed = event.target.value;
+    renderScene();
+  };
+
+  seedElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Seed for the random number generator";
+  });
+
+  seedElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let backgroundElt = window.document.getElementById("background");
+  backgroundElt.addEventListener("input", (e) => {
+    //checkbox
+    doDrawBackground = e.target.checked;
+    renderScene();
+  });
+
+  backgroundElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Toggle background";
+  });
+
+  backgroundElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  let backgroundColorElt = window.document.getElementById("backgroundColor");
+  backgroundColorElt.addEventListener("input", (e) => {
+    backgroundColor = e.target.value;
+    renderScene();
+  });
+
+  backgroundColorElt.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Change background color";
+  });
+
+  backgroundColorElt.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  const resetUI = () => {
+    //update the UI and send input events to the controls
+    seedElt.value = seed;
+    seedElt.dispatchEvent(new Event("input"));
+    startLengthElt.value = startLength;
+    startLengthElt.dispatchEvent(new Event("input"));
+    lenCoeffElt.value = lenCoeff;
+    lenCoeffElt.dispatchEvent(new Event("input"));
+    lenStdElt.value = lenStd;
+    lenStdElt.dispatchEvent(new Event("input"));
+    widthElt.value = startWidth;
+    widthElt.dispatchEvent(new Event("input"));
+    widthCoeffElt.value = widthCoeff;
+    widthCoeffElt.dispatchEvent(new Event("input"));
+    widthStdElt.value = widthStd;
+    widthStdElt.dispatchEvent(new Event("input"));
+    angleCoeffElt.value = angleCoeff;
+    angleCoeffElt.dispatchEvent(new Event("input"));
+    angleStdElt.value = angleStd;
+    angleStdElt.dispatchEvent(new Event("input"));
+    numTreesElt.value = numTrees;
+    numTreesElt.dispatchEvent(new Event("input"));
+    backgroundElt.checked = doDrawBackground;
+    backgroundElt.dispatchEvent(new Event("input"));
+    backgroundColorElt.value = backgroundColor;
+    backgroundColorElt.dispatchEvent(new Event("input"));
+    leafColorElt.value = leafColor;
+    branchColorElt.value = branchColor;
+  };
+
+  const resetVals = () => {
+    //reset all the values to their defaults
+    seed = 61;
+    startLength = 100;
+    lenCoeff = 0.8;
+    lenStd = 0.05;
+    startWidth = 10;
+    widthCoeff = 0.8;
+    widthStd = 0.05;
+    angleCoeff = 0.75;
+    angleStd = 0.2;
+    numTrees = 3;
+    doDrawLeaves = true;
+    drawShadows = false;
+    doDrawBackground = true;
+    backgroundColor = "#000000";
+    branchColor = "#4d2806";
+    leafColor = "green";
+  };
+
+  const resetAll = () => {
+    resetVals();
+    resetUI();
+  };
+
+  const preset1 = () => {
+    resetAll();
+    //click the fancy button
+    fancyRender.dispatchEvent(new Event("click"));
+  };
+
+  const preset2 = () => {
+    resetVals();
+    seed = 69;
+    startLength = 200;
+    lenCoeff = 0.75;
+    lenStd = 0;
+    startWidth = 12;
+    widthCoeff = 0.8;
+    widthStd = 0;
+    angleCoeff = 1.06;
+    angleStd = 0;
+    numTrees = 1;
+    doDrawLeaves = false;
+    doDrawBackground = false;
+    backgroundColor = "white";
+    branchColor = "black";
+    resetUI();
+  };
+
+  const preset3 = () => {
+    resetVals();
+    // 238, 17, 95
+    leafColor = "#ee115f";
+
+    resetUI();
+    fancyRender.dispatchEvent(new Event("click"));
+  };
+
+  const preset4 = () => {
+    resetVals();
+    //0,174,0
+    leafColor = "#00ae00";
+    seed = 56;
+    startLength = 144;
+    lenStd = 0.03;
+    widthCoeff = 0.81;
+    widthStd = 0.03;
+    angleCoeff = 0.89;
+    angleStd = 0.09;
+    numTrees = 1;
+    resetUI();
+    fancyRender.dispatchEvent(new Event("click"));
+  };
+
+  let preset1Elt = window.document.getElementById("preset1");
+  preset1Elt.addEventListener("click", (e) => {
+    preset1();
+  });
+
+  let preset2Elt = window.document.getElementById("preset2");
+  preset2Elt.addEventListener("click", (e) => {
+    preset2();
+  });
+
+  let preset3Elt = window.document.getElementById("preset3");
+  preset3Elt.addEventListener("click", (e) => {
+    preset3();
+  });
+
+  let preset4Elt = window.document.getElementById("preset4");
+  preset4Elt.addEventListener("click", (e) => {
+    preset4();
+  });
+
+  let resetBtn = window.document.getElementById("reset");
+  resetBtn.addEventListener("click", (e) => {
+    resetAll();
+  });
+
+  resetBtn.addEventListener("mouseover", (e) => {
+    helpPane.innerHTML = "Reset all parameters to their default values";
+  });
+
+  resetBtn.addEventListener("mouseout", (e) => {
+    helpPane.innerHTML = defaultHelpText;
+  });
+
+  seedElt.dispatchEvent(new Event("input"));
+
+  renderScene();
+
+  //add a key listener
+  window.addEventListener("keydown", (event) => {
+    if (event.code === "Space") {
+      seed = Math.floor(Math.random() * 100000);
+      seedElt.value = seed;
+      renderScene();
+    }
+  });
+};
+
+const drawFog = () => {
+  //add a grey fog effect using gradient to the bottom of the canvas
+  let gradient = ctx.createLinearGradient(0, 0, 0, canvas.height);
+  gradient.addColorStop(0.25, "rgba(0,0,0,0)");
+  gradient.addColorStop(1, "rgba(0,0,0,.25)");
+  ctx.fillStyle = gradient;
+  ctx.fillRect(0, 0, canvas.width, canvas.height);
+};
+
+const resetBackground = () => {
+  //draw shadow
+  if (drawShadows) {
+    ctx.shadowColor = "black";
+    ctx.shadowBlur = 50;
+    ctx.shadowOffsetX = 5;
+    ctx.shadowOffsetY = 5;
+    ctx.fillStyle = "black";
+  } else {
+    ctx.shadowColor = "none";
+    ctx.shadowBlur = 0;
+    ctx.shadowOffsetX = 0;
+    ctx.shadowOffsetY = 0;
+    ctx.fillStyle = "white";
+  }
+
+  if (doDrawBackground) {
+    //set the canvas background color
+    ctx.fillStyle = backgroundColor;
+    ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+    //create a "moon" in the corner
+    ctx.fillStyle = "white";
+    ctx.beginPath();
+    ctx.ellipse(moonLoc.x, moonLoc.y, 50, 50, 0, 0, 2 * Math.PI);
+    ctx.fill();
+
+    drawStars();
+  } else {
+    ctx.clearRect(0, 0, canvas.width, canvas.height);
+  }
+};
+
+const genTrees = () => {
+  for (let i = 0; i < numTrees; i++) {
+    let tree = new Tree(
+      new Point(Math.random() * canvas.width, canvas.height),
+      startLength,
+      -Math.PI / 2,
+      startWidth
+    );
+    trees.push(tree);
+  }
+};
+
+const drawTrees = () => {
+  trees.forEach(async (tree) => {
+    tree.draw();
+  });
+};
+
+const drawStars = () => {
+  for (let i = 0; i < 100; i++) {
+    ctx.fillStyle = "white";
+    ctx.beginPath();
+    ctx.ellipse(
+      Math.random() * canvas.width,
+      Math.random() * canvas.height,
+      Math.random() * 2,
+      Math.random() * 2,
+      0,
+      0,
+      2 * Math.PI
+    );
+    ctx.fill();
+  }
+};
+
+const getNormalDist = (mean, std) => {
+  let u = 0,
+    v = 0;
+  while (u === 0) u = Math.random(); // to avoid log(0)
+  while (v === 0) v = Math.random();
+  let num = Math.sqrt(-2.0 * Math.log(u)) * Math.cos(2.0 * Math.PI * v);
+  num = num * std + mean;
+  return num;
+};
+
+class Branch {
+  constructor(start, length, angle, stroke) {
+    this.start = start;
+    this.length = length;
+    this.angle = angle;
+    this.stroke = stroke;
+
+    this.end = new Point(
+      this.start.x + this.length * Math.cos(this.angle),
+      this.start.y + this.length * Math.sin(this.angle)
+    );
+
+    this.branches = [];
+    if (stroke < 1) return;
+
+    for (let i = 0; i < 2; i++) {
+      let newAngle =
+        getNormalDist(this.angle, angleStd) + angleCoeff * (i - 0.5);
+      let newLength = this.length * getNormalDist(lenCoeff, lenStd);
+      let newStroke = this.stroke * getNormalDist(widthCoeff, widthStd);
+      this.branches.push(new Branch(this.end, newLength, newAngle, newStroke));
+    }
+  }
+
+  drawLeaf() {
+    ctx.strokeStyle = leafColor;
+    ctx.fillStyle = leafColor;
+    //draw an oval from the start point to the end point at the correct angle
+    ctx.beginPath();
+    //set angle
+    ctx.translate(this.end.x, this.end.y);
+    ctx.rotate(this.angle);
+    //draw oval
+    ctx.ellipse(0, 0, this.length, this.stroke * 2, 0, 0, 2 * Math.PI);
+    ctx.stroke();
+
+    ctx.fill();
+    //reset angle
+    ctx.rotate(-this.angle);
+    ctx.translate(-this.end.x, -this.end.y);
+  }
+
+  drawBranch() {
+    ctx.strokeStyle = branchColor;
+
+    ctx.beginPath();
+    ctx.moveTo(this.start.x, this.start.y);
+    ctx.lineTo(this.end.x, this.end.y);
+    ctx.lineWidth = this.stroke;
+    ctx.stroke();
+  }
+
+  draw() {
+    if (this.length < 20 && doDrawLeaves) {
+      //leaf
+      this.drawLeaf();
+    } else {
+      //branch
+      this.drawBranch();
+    }
+
+    for (let branch of this.branches) {
+      branch.draw();
+    }
+  }
+}
+
+class Tree {
+  constructor(start, length, angle, stroke) {
+    this.start = start;
+    this.length = length;
+    this.angle = angle;
+    this.stroke = stroke;
+    this.root = new Branch(this.start, this.length, this.angle, this.stroke);
+  }
+
+  draw() {
+    this.root.draw();
+  }
+}