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+---
+category: tool
+tool: p5
+contributors:
+    - ['Amey Bhavsar', 'https://github.com/ameybhavsar24']
+    - ['Claudio Busatto', 'https://github.com/cjcbusatto']
+filename: p5.js
+---
+
+p5.js is a JavaScript library that starts with the original goal of [Processing](http://processing.org"), to make coding accessible for artists, designers, educators, and beginners, and reinterprets this for today's web.
+Since p5 is a JavaScript library, you should learn [Javascript](https://learnxinyminutes.com/docs/javascript/) first.
+
+```js
+///////////////////////////////////
+// p5.js has two important functions to work with.
+
+function setup() {
+    // the setup function gets executed just once when the window is loaded
+}
+function draw() {
+    // the draw function gets called every single frame. This means that for a frameRate(30) it would get called 30 times per second.
+}
+
+// the following code explains all features
+
+function setup() {
+    createCanvas(640, 480); // creates a new canvas element with 640px as width as 480px as height
+    background(128); // changes the background color of the canvas, can accept rgb values like background(100,200,20) else grayscale values like background(0) = black or background(255) = white
+}
+
+function draw() {
+    ellipse(10, 10, 50, 50); // creates a ellipse at the 10px from the left and 10px from the top with width adn height as 50 each, so its basically a circle.
+    //remember in p5.js the origin is at the top-left corner of the canvas
+
+    if (mouseIsPressed) {
+        // mouseIsPressed is a boolean variable that changes to true if the mouse buttton is pressed down at that instant
+
+        fill(0); // fill refers to the innner color or filling color of whatever shape you are going to draw next
+    } else {
+        fill(255); // you can give in rgb values like fill(72, 240, 80) to get colors, else a single values determines the grayscale where fill(255) stands for #FFF(white) and fill(0) stands for #000(black)
+    }
+
+    ellipse(mouseX, mouseY, 80, 80);
+    // mouseX is the x-coordinate of the mouse's current position and mouseY is the y-coordinate of the mouse's current position
+
+    // the above code creates a circle wherever mouse's current position and fills it either black or white based on the mouseIsPressed
+}
+```
+
+## Further Reading
+
+- [p5.js | get started](http://p5js.org/get-started/) The official documentation
+- [Code! Programming for Beginners with p5.js - YouTube](https://www.youtube.com/watch?v=yPWkPOfnGsw&vl=en) Introduction and Coding challenges using Processing and p5.js by Coding Train