Use the mouse. There is a glitch where the hair appears on the wrong layer. If this happens, click the flag again and it should be solved.
This used to be for a run-your-own-restaurant game that I will never finish. All of the art is by me, made in the Scratch Vector Editor. Of course, the background is up to you. You can paint it yourself! According to the Scratch Community Guidelines, you must credit me if you use this in any way.