Some artists look to ancient systems of mathematics, religion, medicine, etc. for formal structures. Below is the yin-yang inspired Qi used by artists like choreographer Anne Teresa De Keersmaeker. 

The concept of Qi is based on the ancient Chinese initial understanding of natural phenomena. That is, Qi is the most basic substance of which the world is comprised. Everything in the universe results from the movements and changes of Qi:

"I refer to the five transformations as energetic qualities which are attributed to the architecture and intensity of movement.”

︎︎︎from En Atendant & Cesena: A Choreographer's Score by Anne Teresa De Keersmaeker