I do not choose scraps by era or color or types of prints. The only thing I consider is the contrast of lights and darks. Today 'scraps' seems to mean 'leftovers from projects' to many quilters, but vintage scrap quilts came from a quilter's scrap bag that was a collection of any piece of usable fabric she could save or trade for. My only rule is that its 100% cotton and good quality- so it will last and all pieces will wear at the same rate. The more colors, sizes of prints, plaids, stripes, 30's to present, the more interesting the quilt will be. I'm going to attempt to post four blocks for my Spderweb quilt I am currently working on between other projects. You will see fruit, chickewire, roses, bandanas, stripes and many other prints. What makes it all work together is the solid white. Well it will not let me post the files. I will keep trying...