The first, your paper should be a square piece. Second The top corner and the bottom corner are folded together. The triangle is folded in haft by the left corner and the right corner are being folded. The bottom corner can be met the top corner by the top flap is opened and the left and the right sides are creased. The paper is flipped over so you can do the same thing to the other side. The left flap should be vertically by stood it up. The bottom corner can be met the top corner by the flap is opened up and squash down. The left and the right corner is folded. Finally, the top triangle is folded.