I love scrappy quilts too and buy just about every book I see that features them. You can make any quilt block a scappy one just by using your scraps instead of using a limited variety of fabrics. The principle is the same. It's the placement of the lights and darks that make the pattern emerge. I, unfortunately, always end up buying more fabric for my scrappy quilts. Either I don't have enough darks, or maybe I'm just using flower fabrics and I need more flowers, or maybe I'm just feeding my addiction to buying fabric. So just don't worry and pick up those scissors and go to work!