html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.gauges.circular([20, 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();

});