html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.gauges.circular([{value: 20}, {value: 10}]);

    chart.axis();

​

    // Get knob pointer.

    var firstKnob = chart.knob();

    firstKnob.fill('#FF8A65');

​

    // Get knob pointer by index.

    var secondKnob = chart.knob(1);

    secondKnob.fill('#4DB6AC');

    secondKnob.topRadius(40);

    secondKnob.bottomRadius(30);

​

    chart.title('Get and modify knob');

    chart.container('container');

    chart.draw();

});