Start with the white side up.
Fold into quarters.
Fold the corner into the middle.
Do the same to the remaining sides.
Fold one side up to the middle.
Do the same on the other side.
Unfold the 2 triangles so that it looks like this.
Fold one side over to the middle.
Do the same to the other side.
Open the folds you just made. These are 2 of the sides of your box.
- Square paper