1) Fold the paper in the upper half.
2) Then fold in half to side.
3) Expand the inside and make a triangle. Fold back on the back as well.
4) Fold side back. Fold the back side in the same way.
5) Follow the middle line, fold both sides and fold back down. Fold back on the back as well.
6) When you expand the bottom, it is completed!
■ pattern 2
1) Fold the paper in the lower half.
2) Fold the lower corner obliquely towards the middle.
3) Fold one of the upper surfaces twice backwards.
4) Turn over.
5) Fold both sides towards the middle.
6) Fold twice on top.
7) When you spread the bottom, it is completed!