How to make a manual bookmark?

1. Fold the colored paper in half along two diagonal lines to show traces.

2. Fold the upper and lower corners to the middle and turn them over.

3. Fold the upper and lower sides in half towards the middle.

4. Fold the whole graph up and down.

5. Grab the corners on both sides and slowly spread them into wings.

6. Fold the upper and lower corners inward.

7. Fold the top, and then fold the folded top down into two right triangles.

8. Fold the bottom into a triangle, and fold the sharp corner up a little.

9. Flip, fold and pinch the graph to the middle, and a butterfly bookmark will be made.