39 lines, no comments · 838 tokens, written in 4 seconds for $0.0013

 1  function setup() {
 2    createCanvas(400, 400);
 3    ball = new Ball();
 4  }
 5  
 6  function draw() {
 7    background(240);
 8    ball.update();
 9    ball.display();
10  }
11  
12  class Ball {
13    constructor() {
14      this.x = width / 2;
15      this.y = height / 2;
16      this.vx = random(2, 5);
17      this.vy = random(2, 5);
18      this.color = color(random(255), random(255), random(255));
19    }
20  
21    update() {
22      this.x += this.vx;
23      this.y += this.vy;
24      if (this.x < 0 || this.x > width) {
25        this.vx *= -1;
26        this.color = color(random(255), random(255), random(255));
27      }
28      if (this.y < 0 || this.y > height) {
29        this.vy *= -1;
30        this.color = color(random(255), random(255), random(255));
31      }
32    }
33  
34    display() {
35      fill(this.color);
36      noStroke();
37      ellipse(this.x, this.y, 50);
38    }
39  }