How to use TChart, to change the AreaSeries color

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C++

MFC

color

Builder

1.void __fastcall TForm1::Timer1Timer(TObject *Sender)   
2.{   
3.    if(0.0055 <n && n< 0.008)   
4.    {   
5.        AreaSeries2->SeriesColor = clRed;   
6.        AreaSeries2->AddXY(n,Number);   
7.    }   
8.    else  
9.    {   
10.       AreaSeries1->SeriesColor = clLime;   
11.       AreaSeries1->AddXY(n,Number);   
12.       Number +=(float)1/10;   
13.   }   
14.       n = Now().CurrentTime().Val;   
15.}  

That's a C++Builder project,i want to change the color of the different AreaSeries.For example,at first, I want to brush the green area,Secondly, brush the red area,the C++ code above can be realized. If I want to continue to brush green area,it will cover the red before.How can I brush red green separate area? The color of the regional order is like:green,red,green,red ...
http://delphi.ktop.com.tw/download/upload/50c9336a9441f_20121213093614.png[^]