2. Make a circle with the midpoint of a straight line as the center and the half length as the radius.
3. Delete the redundant line segments and leave half an arc, as shown in the figure.
4. Make an appropriate long vertical straight line with the midpoint of the arc. Two straight lines connecting the end of an arc and the top of a straight line.
5. Delete the redundant lines to get the water drop image.
6. After copying two water droplet images, the positions are evenly distributed.