fading Color

Hi

I'm searching for a way to fill a Morph with more than one Color.
I hope 'fading Color' describes it well. The best example is the
MoviePlayer from the Widgetsflap but I didn't find how to get this
working. Can you help me ?

Regards
           Chris Burkert
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Student of applied Computer Science at Chemnitz University of Technology
     http://www.chrisburkert.de/            chbu@xxxxxxxxxxxxxxxxxx
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"I invented the term Object-Oriented, and I can tell you I did not have
 C++ in mind." - Alan Kay --> http://www.squeak.org/