I have mixed feelings about it. Just a spur-of-the moment-type thing.I did this with my pocket knife a couple nights ago. (I tried inking it in but all I had was an old permanent marker, and I didn't want ink poisoning, so I left it as is.)
It's based on the "Wu Xing" or "Five Movements", which is a elemental diagram created by early Chinese Taoists. The Wu Xing was used for describing interactions and relationships between phenomena. It was employed as a device in many fields of early Chinese thought, including seemingly disparate fields such as geomancy or Feng Shui, martial arts, medicine, and military strategy.
