createCanvas(500, 500);

}

function draw() {

  background(0);

  noStroke();

  for (let i = 0; i < 50; i++) {

    // alpha value increases by 10 with every iteration

    let alpha = 10 + i / 10;

    // size value decreases by 30 with every iteration

    let size = (width-50) - i * 10;

    fill(255, 250, 229, alpha);

    ellipse(width / 2, height / 2, size, size);

  }

}