I want a white background to make it easier to get all the animations of the characters when I use F12, so that I won't have to edit out the background manually which would take a lot of time and be a pain. I want water so I can get the characters' swimming animations. The background should still be white though.

Yes, as a noob it would be hard to place existing tiles into one tileset. I didn't mean "call it my own" as in claiming the tiles I borrowed are MINE. I just want to use existing tiles, from different tilesets. And it will only be for personal uses as I'm sure no one will want to play this level. I wish when you change the tileset it doesn't change the tiles you've already placed into ones from the current selection, because then I would have no problem here.

Derby: Content truncation.