html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var stage = anychart.graphics.create('container');

​

    var rect = stage.rect(20, 20, stage.width() - 50, stage.height() - 50);

​

    // Set bipolar hue progression.

    var color = anychart.color.bipolarHueProgression('#4CAF50', '#FFEB3B', 4);

​

    rect.fill(color);

});