Sure ! I enjoy this link very much (and I also like your Spightonians)

I first thougth that a "static" analysis would be easy and a "dynamic" (to try to detect "purpose") would be complex.
but I was wrong... even the static one is complex

But anyway... that's still a way for me to get more familiar with shapes, which is more important to me than the program itself...

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Converting the book Shape UP! by Charles Matthews/Seong-June Kim
to the gobook format. last updated april 2015 - Index of shapes, p.211 / 216