1. Select three pieces of red paper and three pieces of blue paper. You can also choose the color of the paper according to your own preferences.

2. Overlap two opposite sides of a piece of paper, then disassemble it, and then overlap the two sides with the creases just formed.

3, the other two sides do the same operation, and then we fully expand it, then the four corners will form four small triangles.

Then we fold it in the middle along two fold lines near the edge.

5. Turn it over, and then fold the edge part along the two folding lines near the edge to form a small square.

6. Cube, and then insert the interface as shown below.

7. After complete insertion, a triangular prism is formed, as shown in the figure below.

8. Fold the remaining paper into a triangle.

9. Apply some glue to the shiny surface, one of which is a triangular prism, as shown below. Then choose a blue prism and stick the smooth surface on it to fix it.

10, and then we will stick all the remaining triangular prisms on it and make the following figure.

1 1, then you can put our pens in.