Interesting. I know there are origami blocks, but they are folded and 3D, not PP.
here's the link to the post above referenced:
http://www.quiltingboard.com/main-f1...t-t217867.html
After thinking a bit, I do recall seeing origami crane PP blocks. Here's one:
http://theitinerantchemist.com/2016/...-and-tutorial/