Twist origami: two basic forms

One thing leads to another…
Two basic forms of twist origami designed by origami master Shuzo Fujimoto, and folded by me from a 15cm origami paper.
The lower two photos show the opposite sides of the same form which is done by folding the form shown in the upper photo.
Diagram from Shuzo Fujimoto’s “Twist Origami, Book 1”.