Hi, I kept on the idea for probably at least 3 years, just didn't have time. and finally it's working (beta) :) http://popmokslas.projektas.lt/failai/python/TurtleDemo-NG/ http://www.youtube.com/watch?v=j-XyEoQRZeI&t=1m30s I noticed similar initiative (few days ago) http://code.google.com/p/pynguin/ Probably it could also implement tracing in fashion of http://code.google.com/p/rur-ple/source/browse/trunk/rur_py/cpu.py (mine might be too confusing right now..) -- Jurgis Pralgauskis tel: 8-616 77613; Don't worry, be happy and make things better ;) http://kompiuterija.pasimokom.lt