createCanvas(windowWidth, windowHeight);

  frameRate(15);

  //background(0, 255, 255);

}

​

function draw() {

  background(0, 255, 255, 10);

  fill(255, 0, 0);

  //stroke(255, 255, 0);

  noStroke();

  circle(mouseX, mouseY, 100);

  fill(random(255), random(255), 0);

  circle(random(width), random(height), random(50));

  square(250, 300, 60);

}