// Load the Visualization API and the piechart package.
      google.load('visualization', '1.0', {'packages':['corechart']});
      
      // Set a callback to run when the Google Visualization API is loaded.
      google.setOnLoadCallback(drawChart);
      
      // Callback that creates and populates a data table, 
      // instantiates the pie chart, passes in the data and
      // draws it.
      function drawChart() {

      // Create the data table.
      var data = new google.visualization.DataTable();
      data.addColumn('string', 'Topping');
      data.addColumn('number', 'Slices');
      data.addRows([
        ['Management', 65],
        ['Industre-Experten', 20],
        ['Politik & Interessenvertretung', 10], 
        ['Jungunternehmer ', 5],
      ]);

      // Set chart options
      var options = {'width':620,
                    'height':220,
                    'chartArea.width':'100%',
                    'chartArea.height':'100%',
                    'chartArea':{left:20,top:20,width:"100%",height:180},
                    'legend':'right',
                    'colors':['#DFD9B2', '#C4C2A5', '#AAAC98', '#90968B'],
                    'backgroundColor':'none',
                    'backgroundColor.fill':'none',
                    'backgroundColor.stroke':'none',
                    'fontSize':'8px',
                    'fontName':'Tahoma',
                    'is3D':'false',
                    'legendTextStyle': {color: '#fff', fontName: 'Tahoma', fontSize: '10'},
                    'pieSliceTextStyle': {color: '#000', fontName: 'Tahoma', fontSize: '11'}
                    
                    
                    };

      // Instantiate and draw our chart, passing in some options.
      var chart = new google.visualization.PieChart(document.getElementById('chart_div_1'));
      chart.draw(data, options);
    }