html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

​

    // create a data set

    var data = anychart.data.set([

      ["Winter", 20000, 40000, 20000],

      ["Spring", 20000, 40000, 40000],

      ["Summer", 40000, 30000, 30000],

      ["Autumn", 20000, 20000, 40000]

    ]);

​

    // map the data

    var seriesData_1 = data.mapAs({x: 0, value: 1});

    var seriesData_2 = data.mapAs({x: 0, value: 2});

    var seriesData_3 = data.mapAs({x: 0, value: 3});

​

    // create a chart

    var chart = anychart.area();

​

    // enable the percent stacking mode

    chart.yScale().stackMode("percent");

​

    // create step area series, set the data

    var series1 = chart.stepArea(seriesData_1);

    var series2 = chart.stepArea(seriesData_2);

    var series3 = chart.stepArea(seriesData_3);

​

    // set step direction of all the series to the forward mode

    series1.stepDirection("forward");

    series2.stepDirection("forward");

    series3.stepDirection("forward");

​

    // configure tooltips

    chart.tooltip().format("{%yPercentOfCategory}{decimalsCount:2}%");

​

    // configure labels on the y-axis

    chart.yAxis().labels().format("{%value}%");

​

    // set the chart title

    chart.title("Percent Stacked Step Area Chart");

​

    // set the container id

    chart.container("container");

​

    // initiate drawing the chart

    chart.draw();

});