1, semicircle. We draw a semicircle on white paper, paying attention to smooth lines, closed lines, no crossing, and smooth arcs as much as possible.

2. Rainbow. You can draw several arcs parallel to the outer semicircle in this semicircle, and then it will be a beautiful rainbow.

3. hills. Draw some short lines on the semicircle. Without special rules, it is a very vivid mountain.

4. Umbrella. Draw a few arc diagonals in the semicircle, draw an umbrella handle below, and draw some raindrops on it.

5. watermelon. Turn the semicircle upside down, draw an arc at the bottom, and paint watermelon seeds with a black pen in the blank, and the lovely watermelon will be drawn.

6, jellyfish. Draw a small circle in the middle of the semicircle, and draw some coiled lines below as the tentacles of jellyfish.