Looks pretty interesting, that's for sure. Are you aware that you can control the lines? Now that you've done this a few times you can clearly see what happens when lines leave the sides on an angle. You know how long and how wide your pen is. Now you can physically lay out your pen on a piece of wood. Draw a center line on each side, then box it out from the center so you have a rectangle in the center on both sides of the blank. Now you can draw lines inside the boxes and all lines will stay inside the pen, or you can have most or some lines in the pen and others that leave which causes that circular effect. Controlling the lines by drawing them in the box you can actually create symmetrical designs. Eventually you can progress to a 6 or 8 sided pen blank and with controlling the lines of symmetry you can create cool effects like spiderwebs or fireworks on a pen. It's kinda like those gears with the holes in it and you stick your pencil in the hole creating infinite designs but all designs are symmetric, not random. Nothing wrong with random, but symmetry is more eye pleasing.
