The symbol has sacred meaning to the Zia. Four is a sacred number which symbolizes the Circle of Life: the four directions, the four times of day, the four stages of life, and the four seasons. The circle binds the four elements of four together. this is one of four zia patterns symbols for southwestern design -- stained glass and window clings. The pdf file with this order has four different designs, mostly the closer placement of the rays of the center. but with the fourth pattern having only lead lines for the rays which makes is much simpler.