1. Prepare a square colored paper and fold it horizontally.

2. Fold the bottom corner up, and then fold the top corner down.

3. Fold the bottom corner to the intersection, and then fold the sharp corner on the left to the right.

4. Fold the left part in half to the right and cut off the shadow part with scissors.

5. Expand the triangle into a pentagon.

6. Fold up five faces.

7. Reinforce several creases marked in the drawing.

8. Fold a few corners to the right.

9. Turn it over and fold all five corners to the bottom.