​

function setup() {

  createCanvas(400, 400);

  //create object

  object = new Jitter();

}

​

function draw() {

  background(220);

  object.move();

  object.show();

}

​

//Jitterclass

class Jitter {

  constructor() {

    this.x = random(width);

    this.y = random(height);

    this.diameter = random(10, 30);

    this.speed = 1;

  }

  move() {

   this.x += random(-this.speed, this.speed);

    this.y += random(-this.speed, this.speed);

​

  }

  show() {

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

​

  }

}