Is there any way to make a flag get capped by the pressing and holding of a button? If you let go of the button the whole thing would have to get started again.

You could have it so that when you press a button, a platform gets slightly lowered (exposing you to a dod_capture_area). Then capping would begin, unless you released the button, at which point the platform would rise again and you'd no longer be touching the dod_capture_area.

good method i will try it out and see how it goes.