Material preparation: paper, scissors and pencils.

Operating steps:

1, prepare a square piece of paper and fold it into a triangle with the center line.

2. Fold it again along the center line to form a triangle.

3. Fold the inclined face into three equal parts, and finally face a triangle.

Draw the pattern you want to cut on it with a pencil. Here is a picture of a flower. You can draw it according to your preference.

5. Draw the shadow shape of the cut part with a pencil, and then cut the part without shadow with scissors.

6. After cutting, open the origami and a beautiful and symmetrical flower will be finished.