The tradition of Chinese painting is one of the world's oldest traditions, which goes back to 481-221 B.C., which is the period of the earliest Chinese paintings seen. One of the most popular styles in Chinese painting is called "Mountain and Water", commonly understood as Chinese Landscape painting. That style involves scenes of natural landscapes of China - woods, waterfalls, mountains, and rivers - that represent five elements of the natural world. Each of the five elements has a particular color and interacts with other elements in a holistic positive interaction. Interactions such as: Wood (green) produces Fire (red), Fire produces Earth (yellow), Earth produces Metal (white and gold), Metal produces Water (blue and black), and Water produces Wood.