 First, I want to show you Phi and Fibonacci. It's important to understand for what we're going to talk about. I'll show you what you need to know to continue, and if you want to learn more in depth about these sequences, I will provide sources in the comments. Phi, also known as the Golden Ratio, or Golden Mean, is a very simple relationship. If you had a rod and were going to put a mark on it, only two places would mark the Phi ratio, which is here or here. The length of A plus B is equal to the length of C. This ratio is 1.6180339 and continues on forever. If you multiply the length of C with Phi, it will create the exact same image, only bigger. C and D is equal to E. This ratio could then span on forever, going smaller and smaller or bigger and bigger forever. This ratio is infinite. It has no beginning and no end. It is also believed that Phi is the mathematical root of all other sequences. See, every mathematical sequence in existence needs a minimum of three numbers to figure out the sequence. Phi only needs two.