Is there a tutorial for butterfly bookmarks?

Butterfly bookmark tutorial is as follows:

Material preparation: square colored paper.

Operating steps:

1. First, fold the rectangular paper in half along the center line, first vertically and then horizontally.

2. Then fold a square along the diagonal, but don't cut off the extra part, just fold it inside. Fold a triangle like this.

3. Now turn the triangle upside down and turn both corners back.

At this time, you can fold the rest into a small triangle.

5. After that, fold a small triangle along the outermost side of the triangle, which is only about one-fifth of the big triangle, to make wings.

6. Then fold the big triangles on both sides like that in the same way.

7. This butterfly bookmark is ready.