pop the bubble - OpenProcessing

mySketch
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var bubbles_list = []
var burstcount = 0 ;
var timer
​
function setup() {
  createCanvas(600, 600);
​
  timer = setTimeout(check_if_win_or_lose, 3000);
  for (var i =0;i<100; i++){
    bubbles_list.push( new Bubbles());
  }
  
}
​
function draw() {
  background('pink');
  for (var i =0; i<50 ; i++){
    bubbles_list[i].display();
    bubbles_list[i].move();
    bubbles_list[i].burst();
  }
  
}
​
function check_if_win_or_lose(){
 if(burstcount == 2){
    print("you won")
 }else{
    print("you lost")
  }
}
​
//Blueprint
​
class Bubbles{
  //variable
  // need to put constructor to make it a function 
  constructor(){
    this.x = random(600);
    this.y = random(600);
    this.size = random(10,150);
    this.bubble_color= color(random(0,90), random(4,90), random(60,89));
    this.speed = random(-1, 4)
    
  }
  //functions
  
  //display
  display(){
    noStroke()
    fill(this.bubble_color);
    circle(this.x, this.y, this.size); 
  }
  //move
  move(){
    this.x +=this.speed;
    if (this.x > 600){
      this.speed= - this.speed;
    }
    if (this.x < 0){
      this.speed = - this.speed;
    }
  }
  //popthebubble
 burst(){
   if(dist(mouseX,mouseY,this.x,this.y) < this.size/2){
     if(mouseIsPressed){
       this.x = -100000000;
       burstcount++;
       print(burstcount);
     }
     
   }
 }
}