function drawVisualization() {
  var data = new google.visualization.DataTable();
  data.addColumn('date', 'Date');
  data.addColumn('number', 'Sold Pencils');
  data.addColumn('string', 'title1');
  data.addColumn('string', 'text1');
  data.addColumn('number', 'Sold Pens');
  data.addColumn('string', 'title2');
  data.addColumn('string', 'text2');
  data.addRows([
    [new Date(2008, 1 ,1), 30000, null, null, 40645, null, null],
    [new Date(2008, 1 ,2), 14045, null, null, 20374, null, null],
    [new Date(2008, 1 ,3), 55022, null, null, 50766, null, null],
    [new Date(2008, 1 ,4), 75284, null, null, 14334, 'Out of Stock', 'Ran out of stock on pens at 4pm'],
    [new Date(2008, 1 ,5), 41476, 'Bought Pens', 'Bought 200k pens', 66467, null, null],
    [new Date(2008, 1 ,6), 33322, null, null, 39463, null, null]
  ]);

  var annotatedtimeline = new google.visualization.AnnotatedTimeLine(
      document.getElementById('visualization'));
  annotatedtimeline.draw(data, {'displayAnnotations': true});
}