createCanvas(windowWidth, windowHeight);

  colorMode(HSB, 360, 100, 100, 100);

  background(0);

  noStroke();

  for(let i = 0; i < 100; i++){

    fill(random(0, 80), 60, 100, 40);

    rect(random(width), random(height), random(100), random(100));

    fill(random(200, 300), 60, 100, 40);

    circle(random(width), random(height), random(40));

  }

}

​