​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

}

​

function draw() {

  noStroke();

  fill(r, g, b, 100);

  circle(mouseX, mouseY, size);

  r = random(50, 255);

  g = random(255);

  b = random(255);

  size = random(1, 40);

}

/*

function mousePressed(){

  size = random(1,60);

}

*/