I bought a pattern set for some nursery accessories, and loosely based my stuff off of those patterns. Except the sheet, I cut the sheet exactly as the pattern said.
I will tell you that originally I was not planning on making the sheet, I was going to buy a plain sheet, and making accessories to match, I thought that the sheet would be really difficult for some reason, but I was WRONG. It was probably the easiest part of the whole room.
So in the end I made two.