​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

}

​

function draw() {

  r = random(256);

  g = 0; 

  b = random(256); 

  x = random(width);

  y = random(height);

  noStroke();

  fill(r, g, b, 100);

  circle(x, y, 24);

}

​

function mouseClicked(){

  background(0);

}