​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(mouseX, mouseY, 200);

}

​

function mousePressed() {

  if (mouseX < 100 && mouseY < 100) {fs=fullscreen;fullscreen(fs);

    }

  }

​

​

function windowResized() {

  resizeCanvas(windowWidth, windowHeight);

}

​

​