​

function setup() {

  createCanvas(400, 400);

  for (let i = 0; i < 10; i++) {

    painterBugs[i] = new PainterBug(random(width), random(height), random(10, 30));

  }

}

​

function draw() {

  for (let bug of painterBugs) {

    bug.move();

    bug.display();

  }

}

​

class PainterBug {

  constructor(startX, startY, size) {

    this.x = startX;

    this.y = startY;

    this.size = size;

    this.xSpeed = random(1, 3);

    this.ySpeed = random(1, 3);

    this.color = color(random(255), random(255), random(255));

  }

​

  display() {

    fill(this.color);

    noStroke();

    ellipse(this.x, this.y, this.size, this.size);

  }

​

  move() {

    this.x += this.xSpeed;

    this.y += this.ySpeed;

​

​

    if (this.x > width || this.x < 0) {

      this.xSpeed *= -1;

    }

    if (this.y > height || this.y < 0) {

      this.ySpeed *= -1;

    }

  }

}

​