function setup() {

  createCanvas(windowWidth,

               windowHeight);

  background(255, 0, 255);

}



function draw() {

  var from = color(0, 0, 255, 40);

  var to = color(255, 0, 12, 40);



  stroke(255, 170);

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

  rect(random(width), random(height), 324,56);

　fill(random(0,255),random(100,255),255,120);

　ellipse(random(width), random(height), 87);

}