Pie Chart question

Hi guys,
I'd like to create a Pie Chart where the values can be superimposed. That means that one of the charts can take lets say 80% of the chart and another value 50%, meaning I would have an area of 30% where both graphs superimpose. It'd also be great if the area of superimposition could be of another color or texture. I am attaching a bad picture of what I mean, just for you guys to have an idea. In here the space painted yellow would be the area where the red and the blue circle superimpose.
Can that be done in excel? If not, is there any other program that can do so? I played around a little bit with it, but couldn't figure it out . Thanks a lot for the help!
Charly