anychart.onDocumentReady(function () {
var chart = anychart.area();
var series = chart.splineArea([
{x: 'January', value: 125},
{x: 'February', value: -132},
{x: 'March', value: 141},
{x: 'April', value: -158},
series.negativeFill('#004D40');
chart.title('Set negative fill parameters as a string');
chart.container('container');