How to make an origami menko out of single square paper

(page 4)

5th picture of origami menko out of single square paper

05.

Apply the vertical "gate-fold" of the step #4 and then unfold.

Prepare to rotate the paper by 45 degrees.

6th picture of origami menko out of single square paper

06.

Rotate the paper by 45 degrees.

Prepare to apply a horizontal "valley-fold" and then unfold.