What you see bellow is a standard implementation of mathematical game first devised by the British mathematician John Horton Conway in 1970. The "game" is a zero-player game, meaning that its evolution is determined by its initial state, requiring no further input.
Now this particular one is seeded by equality table of various Javascript values. The example uses loose comparison operator (==) which is notoriously known to produce rather counter-intuitive results.
Hover over a cell to see what is the value / comparison it represents. You can also toggle the cells by clicking on them and create your own patterns.
Surprisingly enough, Javascript doesn't anihilate itself. There appear to be stable elements to it's ecosystem, and potential to evolve past it's original boundries ;)