FFFC #62 in progress

I've been having fun making repetitive patterns with the Notan process.  I'm not sure if this was exactly the intent of the challenge, but once I saw Ticotsky's piece, I had to try it for myself.  Using AutoCAD software made it easy to try several variations.  Here are three that I tried out:

And here is the one I decided to make up - 

(with some simplifications when I started trying to cut it out!)