function setup() {

  createCanvas(windowWidth,

               windowHeight);

  background(234, 234, 234);

}



function draw() {

  var from = color(0, 200, random(100,255), 30);

  var to = color(255, random(20,100), random(100,150), random(30,40));



  fill(lerpColor(from, to, random(1.0)));

  rect(random(width), random(height), 20, 20);

}