1. Prepare cardboard of various colors and cut the paper in half.

　　2. Nail a thumbtack at the center of the bottom of half a piece of paper. The thread is tied to the thumbtack at one end of the pencil and the thread sleeve at the other end. Draw the largest colored semicircle according to the arrangement of rainbow colors. Divided into 6 parts in turn, and each semicircle is smaller than the Zuo Zuo of the last semicircle of 1CM. Of course, it is best to draw a circle with compasses.

　　3. Cut the painted colored paper along the line with scissors.

　　4. After all the colored papers are cut, glue them in order and arrange them.

　　5. Then cut off the semicircular heart at the bottom line and paste it with two cut light blue white clouds. Because there is no green cardboard, the pink cardboard is painted green with a colored pen.