It's a example of using 
Google Chart Tools - Visualization: Pie Chart.

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
  <title>i can code! for Web.</title>
  <script type="text/javascript" src="http://www.google.com/jsapi"></script>
  <script type="text/javascript">
    google.load('visualization', '1', {packages: ['corechart']});
  </script>
  <script type="text/javascript">
    function drawVisualization() {
      // Create and populate the data table.
      var data = new google.visualization.DataTable();
      data.addColumn('string', 'name');
      data.addColumn('number', 'data');
      data.addRows(5);
      data.setValue(0, 0, 'A');
      data.setValue(0, 1, 50);
      data.setValue(1, 0, 'B');
      data.setValue(1, 1, 50);
      data.setValue(2, 0, 'C');
      data.setValue(2, 1, 50);
      data.setValue(3, 0, 'D');
      data.setValue(3, 1, 25);
      data.setValue(4, 0, 'E');
      data.setValue(4, 1, 25);
  
      // Create and draw the visualization.
      new google.visualization.PieChart(document.getElementById('visualization')).
          draw(data, {title:"Google Chart Tools - Visualization: Pie Chart"});
    }
  
    google.setOnLoadCallback(drawVisualization);
  </script>
</head>
<body style="font-family: Arial;border: 0 none;">
  <div id="visualization" style="width: 600px; height: 400px;"></div>
</body>
</html>
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