1
Prepare a square paper. Fold the top and the bottom towards the midline.
2
Fold down the top half to the back.
3
Fold the left and right sides towards the middle line
4
Flip the first layer to the backside.
To do this, open the paper, then push the two triangles together follow the creases.

5
Now the first layer has covered the backside.
6
Fold half of the top square into a triangle by folding in the opening side and pushing in the closing side.
7
Fold down a small triangle from the top.
8
Open one of the triangles on each side.
9
Push it into an opening.
10
Insert the other triangle into the opening.