If you don't know what pattern blocks are here is a pic.

Click image for larger version. 

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I was digging through some old files on my thumb drive. I found a pattern blocks program and I thought I would share. I don't remember where I got the file and I cant find it in Google but, I do remember that it was free. So here is a link for hot file.

Hotfile.com: One click file hosting: Shapes.zip