anychart.onDocumentReady(function () {
var chart = anychart.area();
var series = chart.stepArea([
{x: 'January', value: 125},
{x: 'February', value: 132},
{x: 'March', value: 141},
{x: 'April', value: 158},
var customHatchFill = anychart.graphics.hatchFill('dashed-forward-diagonal', '#ffffff', 0.9, 15);
series.hatchFill(customHatchFill);
chart.title('Set hatch fill parameter as an instance');
chart.container('container');