html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

​

    // create data

    var data = [

      {x: "2020-01-12", value: "6"},

      {x: "2020-01-15", value: "2"},

      {x: "2020-01-18", value: "2"},

      {x: "2020-01-19", value: "5"},

      {x: "2020-02-03", value: "1"},

      {x: "2020-02-19", value: "9"},

      {x: "2020-03-19", value: "2"},

      {x: "2020-04-13", value: "3"},

      {x: "2020-04-15", value: "3"},

      {x: "2020-04-20", value: "4"},

      {x: "2020-04-21", value: "1"},

      {x: "2020-05-10", value: "3"},

      {x: "2020-05-11", value: "1"},

      {x: "2020-05-14", value: "1"},

      {x: "2021-01-12", value: "2"}

    ];

​

    // create a chart and set the data

    var chart = anychart.calendar(data);

​

    // create and configure a color scale.

    var customColorScale = anychart.scales.ordinalColor();

    customColorScale.ranges([

        {less: 3},

        {from: 4, to: 6},

        {greater: 7},

    ]);

    customColorScale.colors(["lightgray", "#ffcc00", "#00ccff"]);

    // set the color scale as the color scale of the chart

    chart.colorScale(customColorScale);

​

    // configure the color range

    chart.colorRange().length("90%");

​

    // configure years

    chart.years().title().fontSize(30);

​

    // set the chart title

    chart.title().useHtml(true);

    chart.title("Calendar Chart: Color Scale (Ordinal)<br><br>" +

                "<span style='font-size:12; font-style:italic'>" +

                "GitHub Contributions</span>");

    // set the container id

    chart.container("container");

​

    // initiate drawing the chart

    chart.draw();

});