3/20/24_#2

let timer;

let interval = 1000;

let growing = true;

let w = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  timer = millis() + interval;

}

​

function draw() {

  background(100);

  if (growing) {

    w = map(timer - millis(), 0, 1000, 0, width);

  } else {

    w = map(timer - millis(), 0, 1000, width, 0);

  }

  noStroke();

  fill("blue");

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

  if (timer < millis()) {

    growing = !growing;

    timer = millis() + interval;

  }

}