function setup() {

  createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  background(255);

  drawForeground() 

  drawBackground()

}

​

function drawForeground(){

  var x = 0;

  let dia=map(mouseX,0,width,50,250)

   while (x <= width) {

  fill("#A5FF00");

  noStroke();

    rect (x,windowHeight/3,20,200);

    x=x+40;

  }

}

​

function drawBackground(){

  fill("purple")

  square(random(width),random(height),10)

}