​

}

​

function draw() {

  ellipse(50, 50, 80, 80);

}

function setup() {

  createCanvas(640, 480);

}

​

function draw() {

  if (mouseIsPressed) {

    fill(0);

  } else {

    fill(255);

  }

  ellipse(mouseX, mouseY, 80, 80);

}