audio auto play next song when previous is finished
<p>I want to create an audio background player where user can only click on image to play or stop the playback. I have trouble creating or rewirting existing codes to make a playlist for it, that automatically plays next song when previous is finished. I want to do it in vanilla js.
<br> Here is what I have so far:
<br><a href="https://jsfiddle.net/rockarou/ad8Lkkrj/">https://jsfiddle.net/rockarou/ad8Lkkrj/</a></p>

<pre><code>var imageTracker = 'playImage';

swapImage = function() {
  var image = document.getElementById('swapImage');
  if (imageTracker == 'playImage') {
    image.src = 'http://findicons.com/files/icons/129/soft_scraps/256/button_pause_01.png';
    imageTracker = 'stopImage';
  } else {
    image.src = 'http://findicons.com/files/icons/129/soft_scraps/256/button_play_01.png';
    imageTracker = 'playImage';
  }
};

var musicTracker = 'noMusic';

audioStatus = function() {
  var music = document.getElementById('natureSounds');
  if (musicTracker == 'noMusic') {
    music.play();
    musicTracker = 'playMusic';
  } else {
    music.pause();
    musicTracker = 'noMusic';
  }
};
</code></pre>