Step 3: Pacmans and sewing.
The larger the mouth, the pointier the circle! I made smaller cuts on the bottom pasties, and larger ones on the top.
This will make the top more tented so that the LED and battery can rest in between the foam circles.
After you have the slits cut, sew them up!
It is important to note that I did not cut a hole in the bottom pastie - only a small one in the top for the LED to go through.