 The cone photoreceptor cells in the retinas of vertebrate eyes are responsible for color vision. These cells form a mosaic pattern that can be found in many different species, including rodents, dogs, monkeys, humans, fish, and birds. This mosaic pattern is universal, meaning it is present in all of these species regardless of their evolutionary history or environment. Furthermore, the mosaic pattern can be described mathematically using the principle of maximum entropy, which allows us to compare the patterns between different species. Additionally, the mosaic pattern can be described using the virial equation of state, which is a mathematical description of how two-dimensional cellular networks behave. Finally, the mosaic pattern can be used to predict the behavior of artificially generated networks and the natural one of the retina. This article was authored by Ali Reza Beghi.