I love scuba diving, so I draw this picture in Photoshop.

I don’t have a Mac pro by now, so I can’t use Sketch or Adobe XD to get the accurate coordinate. As a result, the final picture is a little different from my sketch in Photoshop.

During the process, I met three problems:

1. How to draw a solid semicircle? When I draw the hair, I tried to use “rect()” by setting the two top corners’ radius having the same parameters with the half of the width. But the corners changed automatically when I tried this way. I don’t know why.
2. As I tried to find solutions for the problem above, I coundn’t understand the syntax of arc().
3. I felt it is a little bit difficult to control a curve.