The steps are as follows:

1. Cut out four square pieces of paper of the same size.

2. Fold it twice as shown in the figure, and fold out four center lines. Do not fold the middle part of the paper.

3. Fold the two sides and align them with the centerline.

4. The other two sides are also aligned with the midline fold.

5. Open it.

6. Fold down the four corners and open them.

7. Close along the crease.

8, flattening

9. Open the small square and flatten it.

10, turn to the other side and fold four small corners inward.

1 1. Fold four shapes as shown in the above figure, and stick double-sided tape on two of them as shown in the figure.

12. Stick the other two pictures together, and pay attention to the alignment of the corners.

13, expand the small triangle and arrange the shapes. The top cover is on the left and the bottom cover is on the right.

14. Make a circle with cardboard and paste paper of the same color. The ring should be just big enough to fit in the cake. The diameter is the distance between the opposite sides of an octagon, and the height is half of this distance.

15, put the ring into the base, stick the eight triangles of the base on the ring, and find the correct position.

16. Glue the cover in the same way, and the small triangle of the cover and the small triangle of the base are interspersed with each other.

17, add origami flowers and paper roses, and the cake is finished.