Begin with a piece of square paper. You can use origami paper or fold any piece of paper diagonally from the corner to the opposite edge and trim off the excess.
Fold the paper in half. Crease the fold with your finger. Open the piece of paper.Fold the paper in half in the other direction. Use your finger to crease the fold, then open the paper again. You should now have two creases that intersect at the center of the square.[1]
Fold the corners to the center. Bring each one to the center, so that the points are all touching. Crease the folds with your finger. Rotate the paper so it sits squarely in front of you, but don't unfold it this time.[2]old the top and bottom edges to the center of the paper. Crease the edges with your finger, then unfold them. The triangles should still be in place.