let circleSize;

​

function setup() {

  createCanvas(800, 600);

  background(0);

}

​

function draw() {

  noStroke();

  fill(random(255), random(255), random(255), random(200));

  circle(mouseX, mouseY, random(10,48));

}

​

function mousePressed() {

  background(0);

  // r = random(255);

  // g = random(255);

  // b = random(255);

}