let x = 20;

let speed = 0.001;

let ac = 0.0001;

​

​

let inhale = false;

let pause = false;

let exhale = false;

​

​

function setup() {

  createCanvas(710, 400);

  background(0); 

  noStroke();

  ellipseMode(RADIUS);

  frameRate(10)

​

}

​

function draw() {

  background(0);

    drawGradient(width/2, height / 2);

​

}

​

function drawGradient(f, y) {

​

  let h = 0;

  setTimeout(inhale=true, 1000);

   if (inhale) {

     speed = speed

     ac++

     let out = int(setTimeout(500));

      if (out==500){

        pause = true

      }

  } if (pause){

    speed = speed*0

     ac = ac*0

    setTimeout(exhale, 500);

  }

  if (exhale) {

    speed = -speed

    ac = -(ac++)

   setTimeout(inhale, 500);

  }

  for (let r = x; r > 0; --r) {

    fill(255, 255, 255, h);

    ellipse(f, y, r, r);

    h = h +0.2    

  }

    x = x + speed + ac

}