A Pie chart with a halo effect

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.pie.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="350" height="250">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    var labels = [
        'Alvin',  'Pete', 'Luka',
        'Hoolio', 'Jack',
        'Kev',    'Luis',
        'Lou',    'Jesse'
    ];

    var pie = new RGraph.Pie({
        id: 'cvs',
        name: 'cvs',
        data: [4,3,2,9,5,1,6,8,4],
        options: {
            shadow: false,
            linewidth: 5,
            labels: labels,
            labelsSticksList: true,
            labelsSticksColors: '#aaa',
            labelsSticksLinewidth: 2,
            textAccessible: true,
            textSize: 14
        }
    }).on('draw', function(obj)
    {
        RGraph.path2(
            obj.context,
            'lw 5 b a % % % 0 6.2830 false s white',
            obj.centerx,
            obj.centery,
            obj.radius - 12
        );

    }).draw();
</script>