function setup() {

  createCanvas(windowWidth,

               windowHeight);

  background(0,0,0,100);

}



function draw() {

  var from = color(00, 210, 100, 50);

  var to = color(50, 250, 0, 0);



  stroke(10, 30);

  fill(lerpColor(from, to, random(2.0)));

   rect(random(width), random(height), 50, 30);

}