createCanvas(400, 400);

}

​

function draw() {

  if (mouseIsPressed) {

    fill(0);

    circle(mouseX, mouseY, 7);

  }

​

  rect(300, 300, 50, 20);

  text("Clear", 310, 315);

​

  if (mouseX > 300 && mouseX < 350 && mouseY > 300 && mouseY < 320) {

    if (mouseIsPressed) {

      background(255);

    }

  }

}

​