html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.waterfall([

        {x: 'Start', value: 166},

        {x: 'January', value: 43},

        {x: 'February', value: -79},

        {x: 'March', value: -46},

        {x: 'April', value: 84},

        {x: 'End', isTotal: true}

    ]);

​

    var series = chart.getSeries(0);

​

    // Set falling fill.

    series.fallingFill(function () {

        return anychart.color.darken(this.sourceColor);

    });

​

    chart.title('Set falling fill parameter as a function');

    chart.container('container');

    chart.draw();

});