The I Ching or Way of Changes has been in use in China in some form for at least six thousand years. It is a system of images, or archetypes as Carl Jung called them in his foreword to The Richard Wilhelm translation, 1950, Bollingen Foundation,Inc & the Princeton University Press, NYNY. The images or hexagrams are associated with principles and accompanied by narratives. There are sixty-four hexagrams made up of arrangements of either unbroken (yang) or broken (yin) lines. These patterns correspond to various objects and states in the natural & human world.

An individual engaged in decision-making may obtain a hexagram by random activity which is then recorded and meditated upon.
Commonly, by tossing three coins six times. Each toss produces a line which will either be recorded as broken or unbroken depending upon the number of heads or tails in the toss. Traditionally, yarrow stalks were used.

This version is online:

Here is an arrangement of the hexagrams.

Some of the best-known contepmporary artistic uses of this method was in the work of composer John Cage & choreographer Merce Cunningham. They often collaborated and used non-deterministic or aleatoric means to construct a performance. The philosophic roots of this approach can be traced to Dada movement where artists felt suspicious of their own mental habits and prejudices in creating art.