var g = 240;

var b = 240;

​

function setup() {

  createCanvas(400, 400);

  background(0);

  // fill(r,g,b);

}

​

​

​

function draw() {

  // background(0);

  strokeWeight(0);

  fill(r,g,b);

  ellipse(mouseX,mouseY,20);

}

​

function mousePressed() {

  r = random(100,250);

  g = random(100,250);

  b = random(100,250);

}