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README.md

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+# π-chain
+
+Pi chain is a little game for the super nerd who has memorized Pi. A pi chain is a 
+series of numbers created by a number at any given decimal digit of pi and using 
+the decimal digits of pi to determine the next number in the chain. You can play 
+single-digit pi chain with the first 9 decimal digits of pi, double-digit pi chain 
+with the first 99 decimal digits of pi, or triple-digit pi chain with the first 
+999 decimal digits of pi.
+
+![pi-chain.html](pichain.gif)
+
+For example, starting with the number 4, a single-digit pi chain would be the 
+series: 4, 5, 9, 3, 1. This is because the 4th decimal digit is 5, the 5th is 9,
+the 9th is 3, the 3rd is 1, and then the 1 repeats infinitely.
+
+For two-digit pi chain, starting with 37, the two digits at the 37th decimal 
+digit of pi are 19, at the 19th decimal digit of pi you find 46, and at the 
+46th decimal digit of pi, you find 37, which means you've found a 3-link loop.
+
+For three-digit pi chain, you start with any random number from 1 to 999 and 
+use the three digits of pi at that position to determine the next link in the 
+pi chain.