Answer:
I'm a type of pizza that is folded in half before cooking to contain a filling
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
What can you put in a barrel to make it lighter?
What turns everything around but does not move?
Has no feet, but travels far. Is literate, but not a scholar. Has no mouth, yet clearly speaks.
What do angels sing in the shower?