1. First, fold the red square paper in half, as shown in the following figure:
2. Fold the closed side upwards 1cm, and then open it, as shown in the following figure:
3. Fold the leftmost line in the middle, as shown in the figure below:
4. Then press the inner corner out of the crease, as shown in the figure below:
5. Press the crease clockwise, as shown in the following figure:
6. Pinch a sharp corner from the square above, as shown in the figure below:
7. Fold down the following four sides in turn, as shown in the figure below:
8. Fold the last corner to one side, as shown in the figure below:
9. Hold the sharp corner by hand and turn it clockwise, as shown in the figure below:
10, roll the outermost four edges outward, as shown in the following figure: