Previous pinner "If this isn't a scrap buster, I don't know what is. But you know me, I'd do it in a more neutral/warm colorway. Instructions in spanish but there's a diagram. You do know how to read diagrams, right? :-) Easier than one might think.
This takes the traditional granny square afghan to a whole new level! The three-color Weekend-Wonder Giant Granny Square Throw from Red Heart Yarn is made from the center out in one piece, so that there are no seams to sew once you finish.