​

//everythign on a webpage can register an event 

let bubbles =[];

function setup() {

  createCanvas(400, 400);

}

​

function mousePressed(){

  let r =random(10,50);

  let b= new Bubble (mouseX,mouseY, r);

  bubbles.push(b);

}

​

function draw() {

  background(220);

  for (let i = 0; i<bubbles.length;i++){

    bubbles[i].move();

    bubbles[i].show(); 

  }

}

​

class Bubble{

  constructor(x,y,r){

  this.x= x;

  this.y= y;

   this.r = r;

}

  move(){

    this.x = this.x +random(-5,5);

    this.y = this.y+ random (-5,5); 

  }

  show(){

    stroke (255);

    strokeWeight(4);

    noFill();

    ellipse(this.x, this.y, this.r*2);

  }

}