2. Fold a "meter".
3. Fold the upper and lower sides to the center line respectively.
4. Open it and continue to fold in the other direction.
The upper and lower sides are folded in along the crease just now.
6. The four corners are folded inward to form a square.
7. Turn to the back.
8. Fold the four corners to the center point, just to fold a layer of paper.
9. Turn to the back.
10. Fold in along the diagonal crease.
1 1. If you are worried that they are not strong enough, you can use glue.
12. Just tidy it up at last, and a simple origami flower ball will be finished.