1. First, cut a piece of red cardboard into two hearts, as shown in the figure.
2. Prepare a large green cardboard, fold it in half, and then unfold it, as shown in the figure.
3. Prepare a blank sheet of paper and cut out an inverted triangle, as shown in the figure.
4. Green card with white glue, as shown in the figure.
5. Draw a pattern on the whiteboard as shown.
6. Stick the heart-shaped pattern on the inverted triangle of white cardboard to make the card.