How to origami decompression ball

The decompression ball is an interesting origami hand. The following are the folding steps of the decompression ball:

1.？ Prepare a square piece of colored paper, fold its diagonal in half and unfold it.

2.？ Fold in half left and right, intersect with the centerline of the polyline, and then expand.

3.？ Fold in half up and down, the broken line intersects with the center line, and then expand.

4.？ Fold the four corners of the paper to the center point so that the four corners intersect at the same point.

5.？ Fold the vertex of each small triangle upward, and the broken line intersects with the center point.

6.？ Fold down the vertex of each small triangle so that its edge is parallel to the bisector in the previous step.

7.？ Fold the left and right corners of each small triangle inward so that its edge coincides with the bisector in the previous step to form a diamond.

8.？ Fold each diamond upward from the center point to make it symmetrical left and right.

9.？ Fold the left and right corners of the diamond inward so that its edge coincides with the bisector in the previous step to form a small square.

10.？ Fold the four corners of each small square in half to the center point to form a sphere.

After completing the above steps, you can begin to decompress the ball. Starting from the top of the sphere, gently twist and push the sphere until it is fully unfolded. Many triangles and diamonds will be formed on the surface of the expanded sphere, which looks very interesting.