html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.line([

        {x: 0, value: 6},

        {x: 1, value: 10},

        {x: 2, value: 18},

        {x: 3, value: 11},

        {x: 4, value: 9}

    ]);

    chart.yScale().minimum(0);

    chart.xScale('linear');

​

    var controller = chart.annotations();

​

    var annotation = controller.rectangle();

    annotation.xAnchor(1.9);

    annotation.valueAnchor(17.5);

    annotation.secondXAnchor(2.1);

    annotation.secondValueAnchor(18.5);

​

    // Set fill.

    annotation.fill(['#FEFEFE', '#424242'], 0.6, 0.5, null, 0.8, 0.9, 0.31);

​

    chart.title('Set fill as a radial gradient');

    chart.container('container');

    chart.draw();

});