I'm 16 I want my abbs to show. I'm skinny its just I have a little etra fat on top of my abbs.whats the best way to rid of them

There's 3 different kinds of situps that I do. One is a regular situp with your feet on the ground, which works your top abs. to work your middle abs, put the bottoms of your feet together and spread your legs apart so your knees are facing out (like a butterfly but laying down). Then there's my favorite, which is holding your legs up in a 90 degree angle, because this one works your lower abs, which should help that bottom flab go away!