2. Fold the unopened side up 1 cm, and then open it.

3. Fold the leftmost line in the middle.

4. Then press the inner corner out of the crease.

5. Twist clockwise according to the crease.

6. Pinch the square above into a sharp corner.

7. Fold the four sides in turn.

8. Fold the last corner to one side.

9. Hold the sharp corner with your hand and turn it clockwise.

10, just roll out the four edges of the outermost layer.