anychart.onDocumentReady(function () {
var chart = anychart.cartesian();
var series = chart.rangeArea([
{x: 'January', low: 2, high: 3},
{x: 'February', low: 3, high: 6},
{x: 'March', low: 2, high: 4}
series.fill(['#FEFEFE', '#424242'], 0.6, 0.5, null, 0.7, 0.7, 0.31);
chart.title('Set fill as a radial gradient');
chart.container('container');