1. Cut out a sheet of colorful paper with a width that's divisible by three; ours is 12 inches (the height is 7). Use a ruler to divide width into three equal parts; fold paper at those points. Unfold. Fold left flap over middle (these panels will be card's front), then fold both in half (use a bone folder, if you like). Draw a half circle (or half square) over outer fold as shown; cut out, cutting through all layers, just outside line.