Just a q the tileset that you use to create the screen has to be made by yourself?
(this does not effect if i do it or not i just wanna know )
Nope, it can be any tileset, made by anyone, although I'd prefer if you didn't use one that's already in a previous exhibit/screen. I also have a list of used tileset slots, so if someone's already used one, you either have to import that tileset again and renumber it, use a different one, or renumber the other person's and fix all their stuff.