createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  background(220, 20, 120);

  stroke(0);

​

  let secondsNow = second();

​

  // seconds -> circle width: [0, 59] -> [20, width]

  let secondDiam = map(secondsNow, 0, 59, 20, width);

​

  // seconds -> amount of green: [0, 59] -> [128, 255]

  let greenVal = map(secondsNow, 0, 59, 128, 255);

​

  translate(width / 2, height / 2);

  fill(35, greenVal, 155);

  ellipse(0, 0, secondDiam);

}

​