createCanvas(600, 600);

}

​

function draw() {

  background('black');

  noStroke();

  ellipseMode(CENTER);

  fill('white');

  ellipse(300, 300, 300, 300);

​

  var x = map(mouseX, 0, width, 250, 320);

  var y = map(mouseY, 0, height, 250, 350);

​

  fill('black');

  ellipse(x, y, 150, 150);

​

  var xs = map(mouseX, 0, width, 230, 340);

  var ys = map(mouseY, 0, height,200, 400);

  fill('white');

  ellipse(xs,ys,20,20);

​

}