anychart.onDocumentReady(function () {
var chart = anychart.line([
{x: 'January', value: 20},
{x: 'February', value: 50},
var background = chart.background();
background.leftStroke('#9E9E9E', 4, '9', 'round', 'round');
chart.title('Set left stroke parameters');
chart.container('container');