1. 1Start with a standard letter-sized piece of paper (A4, printer paper).
2. Grab the top left hand corner and place it down on the other side of the paper so the top of the paper is aligned with the right side. Make a crease along the diagonal side.
3. Grab the top right hand corner of the paper and place it at the end of the left hand crease. Make a crease along the right hand diagonal side.
4. Fold the paper in half longways (left created corner to right created corner). Make sure that the flap does not poke out.
5. Grab the right corner and place it down on the center crease so the edge aligns with the center crease. make a crease along the side.