var song;

var button;

var amp;

var volhistory = [];

​

function toggleSong() {

  if (song.isPlaying()) {

    song.pause();

  } else {

    song.play();

  }

}

​

function preload() {

  song = loadSound("rnb.mp3");

}

​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES);

  song.play();

  button = createButton("toggle");

  button.mousePressed(toggleSong);

  amp = new p5.Amplitude();

}

​

function draw() {

  background(0);

  var vol = amp.getLevel();

  console.log(vol);

  volhistory.push(vol);

  stroke(255);

  noFill();

​

  translate(width / 2, height / 2);

  beginShape();

  for (var i = 0; i < 360; i++) {

    var r = map(volhistory[i], 0, 1, 10, 300);

    var x = r * cos(i);

    var y = r * sin(i);

​

    vertex(x, y);

  }

​

  endShape();

​

  if (volhistory.length > width - 50) {

    volhistory.splice(0, 1);

  }

​

  stroke(255, 0, 0);

}

​