function setup() {

  createCanvas(windowWidth,

               windowHeight);

  background(0,0,0);

}



function draw() {

  var from = color(255, 200, 255, 40);

  var to = color(random(1,255), random(1,255), random(1,255));



  fill(lerpColor(from, to, random(6.0)));

  rect(0,0,height,width;

}