function pacman()
{
    $chart = new GooglePieChart('p', 130, 100);
    $data = new GoogleChartData(array(80, -20));
    $data->setColor('f9f900');
    $chart->addData($data);
    $chart->setFill('73A2BD');
    // I pass null to enable the "legend" trick
    $data = new GoogleChartData(null);
    $data->setColor('73A2BD');
    $data->setLegend('O O O');
    $chart->addData($data);
    $chart->setLegendPosition('r');
    $chart->setRotation(0.628);
    return $chart->getUrl();
}