0, 100);
    volumeMeter.value = getRandomInt(-220, 220);
  }, 1000);

  setInterval(function() {
    messageQueue.pop();
  }, 1200);

  var nodes = [
    {
      id: 'a',
      x: 40,
      y: 40,
      color: getRandomColor(),
      size: 15,
      text: {
        value: 'Node A',
        color: getRandomColor(),
        font: '16px Arial',
        xOffset: 0,
        yOffset: -20
      },
      neighbors: [{
        id: 'b',
        edge: {
          width: 1,
          color: COLOR.blue,
          dash: