Added button app in index.md

Author: RiyaGupta89

Index.md

@@ -58,3 +58,4 @@
 | [ConnectFour](https://github.com/Shauryaditya/Web-dev-mini-projects/tree/main/ConnectFour)                                  |  This is a simple game which can be played between two players.The player who connects the four bubbles first wins the game . The bubbles could be connected horizontally , vertically or diagonally.The players have to be together since multiplayer feature is not available .|
 | [Expand Button](https://github.com/Ayushparikh-code/Web-dev-mini-projects/tree/main/Expand-Button) |It is a basic website with an expanding button on it. As we click on the button it expands and shrinks after 5 seconds. |
 | [Color Guessing Game](https://github.com/Ayushparikh-code/Web-dev-mini-projects/tree/main/color-guessor) |It is a basic color guessing game where the player is given a rgb value and he has to guess the color from that.|
+| [Javascript Color Change App](https://github.com/Ayushparikh-code/Web-dev-mini-projects/tree/main/JAVASCRIPT%20BUTTON%20APP) | It is a basic web app where the user can select a color from the options that are given on the web app and as he clicks on that option, all the buttons background color changes to that color. |