This is the fourth article in a series of posts that I've been making on creating digital logic gates in the game of life. The first, couple of articles started out with how to create digital logic gates and use them in order to construct simple circuits. In this post we're going to actually build a first real computer: a (2-stage pipelined) unlimited register machine. And later on ([5]) we'll make an even better computer. Pictured below is the execution of an unlimited register machine which is...