Fade Out Circle

var sound, amp;

var s = 100;

​

function preload() {

  sound = loadSound('sound.mp3');

}

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(100);

  sound.play();

  amp = new p5.Amplitude();

}

​

function draw() {

  background(0);

  fill(255);

  translate(width/2, height/2);

  //get Amplitude

  var level = amp.getLevel();

  s = level * 200;

  //decrease the circle size till 0

  s = s - 1;

  if (s <= 0) {

    s = 0;

  }

  ellipse(0,0,s,s);

}