[PD] GEM: tassellation patterns and persistence of data?

[alberto.zin at poste.it]

Hi all,

I have two questions/curiosities about GEM:

1) is it possible/technically feasible to make 
tassellation patterns (regular 
division of the plane, eg. like Escher works) in GEM ? 
anybody did something similar ?

2) is it possible to have a (I don't know how to call 
it) "persistence of vision" effect in GEM ? I mean, 
suppose for example I want to use a "translateXYZ" for a 
rectangle; 
the effect I've in mind is something like a "trace" of the
movement on the screen with configurable persistence of 
the trace.. I'm also thinking to oscilloscope-like effects 
in GEM ...

Thanks in advance

Alberto Zin