To play randomly, add the songs like this:
init ([ 'https://demo.com/songs/song1.mp3, 'https://demo.com/songs/song2.mp3, 'https://demo.com/songs/song3.mp3 ]);
Use the following to play randomly using Math.random:
function displayRandom() {
var audio = Math.floor(Math.random() * (collection.length));
audio = collection[audio];
audio.play();
setTimeout(loop,audio.duration*1000);
}