At last I've conquered this elusive technique. It took a class with Linda Hurt at the Art League to figure it out. She presented it in a clear manner and waited patiently as we struggled to get the threads in the right order and then having to work backwards to start over and over. The trick to getting it is using two colors of yarn. Then you. Match the colors and it's much more obvious how it functions. Here are a couple pics of my bag from class, then another bag I made in Hufflepuff colors. My goal is to make more in Harry Potter house colors! And check me out at the Wizarding World of Harry Potter back in January!