Origami meets math with surprising results.

Not my childhood Origami but worth the watch:

• Folding way-new origami - Robert Lang | TED-Ed

I downloaded his  TreeMaker and read the help. I drew a pattern, printed my sheet and went to bed. I think I will have to join a club to make any real progress.

Steve

I tried to figure it out using these links.

• Videos: how to fold cp origami - Google Search
• Jason's Origami Page
• Origami Österreich
• www.origami.at/diagrams/boxpleating_guide_1.pdf
• Crease Patterns For Folders

Français: Patterns Crease pour les dossiers « Science studies