IMPORTANT: YOU MUST READ THESE INSTRUCTIONS BEFORE DOING ANYTHING! You have to do an @ symbol at the start of your name and the buttons you click to do this are Shift and 2 at the same time! :) When you want to sign your name you have to click the remix button, then you go to backgrounds. When you are on backgrounds you click the big T opposite the paint bucket. Wherever there is room to fit your username and movie/book on the background click that space and when you see a blue box that looks like dots connecting it, Write your username and don't forget the @ symbol!
Everyone who has done this gets full credit. I haven't seen anything like this but I just know that there is a LOT of things like this so there is no question that this has not been done before because if you look up Harry Potter on scratch there is about 10000 things harry potter related.