First, fold the red square paper in half.

Second, the unopened side is folded up 1 cm, and opened.

Third, fold the leftmost line in the middle.

Fourth, 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 following four sides in turn.

Eight, put the last corner on the side.

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

Ten, the outermost four sides can be rolled outward.