anychart.onDocumentReady(function () {
var chart = anychart.line([
chart.yScale().minimum(0);
var controller = chart.annotations();
var annotation = controller.rectangle();
annotation.valueAnchor(17.5);
annotation.secondXAnchor(2.1);
annotation.secondValueAnchor(18.5);
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');