What you are looking to do is cut the colors sort of in sections. So that some of your pieces will look light blue. Others a darker blue. And a bunch varying shades in between depending how much of the light and darker colors you get. Cut to big and the color differences won't show as well. I find cutting smaller is easier. Just gives you more pieces to put together. Watching them all go together is a lot of fun though. That is the most adicting part.