Combination of real-time graphs

I'm trying a combination of graphics and would like to use area and line , but I can not.

I'm taking the example of fusioncharts .

It runs in real time .

I tried to do this and nothing:

"dataset": [
                {
                    "seriesName" : "clothing.hsm.com",
                    "data": [
                        { "value": "12" }
                    ]
                },
                {
                    "seriesName" : "food.hsm.com",
                    "renderAs"   : "line",
                    "data": [
                        { "value": "20" }
                    ]
                }
            ]

I'm trying to follow this and example is not working

More or less as in figure