Joy to the World using J5 piezo. Crashes at "come" ( ["C4", 1] ) because it's missing a comma

joyToWorld.js

var five = require('johnny-five');

five.Board().on('ready', function () {
  var piezo = new five.Piezo();
  var joyToWorld = {
    song: [

      ["C5", 1],
      ["B4", 3/4],
      ["A4", 1/4],
      ["G4", 3/2],
      ["F4", 1/2],
      ["E4", 1],
      ["D4", 1],
      ["C4", 1]
      [null, 1/2],
      ["G4", 1/2],
      ["A4", 3/2],
      ["A4", 1/2],
      ["B4", 3/2],
      ["B4", 1/2],
      ["C5", 1]
    ],
    tempo: 80
  };

  // Play it !
  piezo.play(joyToWorld, function() {
    process.exit(1);
  });

});