Preparation materials: colored post-it notes and scissors.
1. Fold the square post-it note into a big triangle, one on the left and one on the right. This kind of folding is a clear crease. Fold the post-it note and unfold it to get two diagonal lines and a cross crease.
2. Choose one of the two crossed creases and fold the post-it note inward along the crease. If the crease is clear enough, this step is very simple.
3. Fold and flatten the sunken place.
4. A small triangle will be formed after folding, as shown in the figure.
5. Continue to face the triangle and cut the sharp corner of one side into an arc with scissors.
6. After cutting, unfold. In this way, the next two corners of the original triangle will become arcs.
7. Fold the two arc corners of the upper layer to the middle crease.
8. Then turn it over and turn the sharp corner upside down. The sharp corner slightly exceeds the opposite side, and then flatten it.
9. Then turn it over, fold the exposed small sharp corner and flatten it.
10, enter the final stage, slightly fold the wings in half, and then bend them to make the overall feeling of the butterfly softer and less stiff.