LOGO-L> Restricted vision, help?

[mikedoyle@cix.compulink.co.uk (Mike Doyle)]

A partially sighted pupil, frustrated by not being able to see the output 
of the recent one-liner competition asked me: 

"How can I tell if a Turtle Geometry procedure will draw a closed shape if 
I can't see the shape on the screen. Is there a Logo procedure for testing 
Turtle Geometry procedures to see if they will draw a closed shape? If 
there was one I could make the screen change colour to tell me."

Any suggestions?

Micheal O Duill
EuroLogo Scientific Committee Chairman

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