{ "bg_colour":"#ffffff", "y_axis":{ "max": 100, "steps": 10 }, "elements":[ { "type": "bar", "colour": "#52A8FA", "alpha": 0.5, "text": "dataset 1", "font-size": 10, "values" : [17,26,53,96] } ], "x_axis":{ "labels": { "labels":["2011","2012","2013","2014"] } } }