Step 1: We fold the rectangular paper into a cross, and then put the origami vertically.
Step 2: Fold the transverse centerline in half (valley fold).
Step 3: Fold the above two right-angle pairs parallel to the center line into two isosceles right-angle triangles.
Step 4: Open these two triangular creases and fold the origami inward.
Step 5: Open and flatten both sides of the origami.
Step 6: We open the middle of the protruding rectangle below and fold it up into a triangle.
Step 7: The size of the folded triangle in Figure 6 is unlimited. It is suggested to fold an obtuse triangle about 120, so that the butterfly's wings will be more beautiful, and the triangle folded from both sides should be the same size.
Step 8: We will origami our own DIY butterfly wings and body patterns.
The second bookmark method is as follows:
Take a rectangular piece of paper 15 * 7.5cm, fold it in half along the short side, and then fold it up to the center line.
Turn the origami upside down, fold the center line to the crease, and then fold the short side to the crease.
Turn the origami upside down, fold the two inner corners upwards respectively, and then spread it flat.
Write down your favorite celebrity quotations, draw pictures and make a simple bookmark.