Only thing he is doing in the create is creating the object and parent of course then in the step of the parent hes making the background scroll back, and forth with different sprites on a grid set using path's to configure it, and in the drawing of the parent the top is him putting shortcuts for all the coding he did the middle is making the backgrounds have a certain position to where it started and will finish, and the bottom is preety much what it says. (It's drawing the background in 3 different styles for each part tiled, vertical, and horizontal.