Update README.md

Author: drendog

README.md

@@ -1,14 +1,17 @@
 # Logic Circuit Simulator
-A simple logic circuit simulator made with p5.js library.
+A logic circuit simulator made with [p5.js library](https://github.com/processing/p5.js), useful for educational use. It can be used for simulate combinational and sequential circuits.
 
 ### Demo live
 A live version is available [here](https://drendog.github.io/Logic-Circuit-Simulator/).
 
 ## Usage
+
 ### Demo
+
 ![](demo.gif)
 
 ### Tools
+
 ![](simulator/img/pencil.svg) Edit - Move the components - Connect wires
 
 ![](simulator/img/hand.png) Move the whole circuit
@@ -19,37 +22,45 @@ A live version is available [here](https://drendog.github.io/Logic-Circuit-Simul
 
 ![](simulator/img/LogicOutput.png) Logic Output
 
-## Built With
-* HTML
-* Javascript
-* [p5js](https://github.com/processing/p5.js) library.
-
 ## Set up for offline work
+
 ### Prerequisites
-* [Nodejs](https://nodejs.org)
+
+* [Nodejs](https://nodejs.org) or some local web server ([more info](https://github.com/processing/p5.js/wiki/Local-server))
 * git
 ```bash
 sudo apt-get install git
 ```
 
 ### Clone the repository
+
 ```bash
 git clone https://github.com/drendog/Logic-Circuit-Simulator.git
 ```
 
 ### Serve it on local
+
 ```bash
 cd Logic-Circuit-Simulator
 npx serve
 ```
+
+## :book: Reference book
+
+Hamacher, C., Vranesic, Z., Zaky, S., & Manjikian, N. (2011). Appendix A. In *Computer Organization and Embedded Systems* (6th ed., p. 465). McGraw-Hill Education.
+
 ## 🤝 Contributing
+
 Contributions, issues and feature requests are welcome.
 
-## TODO
-Everything 🙃.
+## :wrench: TODO
+
+Code documentation and everything.
 
 ## Author
-👤 **[DesrevernU/drendog](https://github.com/drendog)**
+
+👤 **[drendog](https://github.com/drendog)**
 
 ## License
+
 [MIT](https://choosealicense.com/licenses/mit/)