Fusioncharts Multi-line graph with background color

We want to make an early warning line chart.

0-15 is safe, 16-30 is Reminder, 31-45 is warning, and 45 is warning.

But what should be done with a clear background? As the same effect

The background code is as follows

<dataset seriesname= "safety" renderas= "area" alpha= "showplotborder=" 3 "  color=" #00FF00 ">         <set Value= "/></dataset>"

Key attributes

renderas= "area" background style

Alpha= "100" transparency setting (if not set, it will have a color effect with the red background behind it)

Fusioncharts Multi-line graph with background color