Four Cells
Semi-interesting. Click Start and.. nothing happens! This is known as a Still Life or Stable pattern.
A Spaceship
Now. This is a spaceship - a pattern that returns to its initial state after a number of generations but in a different location. This particular spaceship is a type of glider, which is just a small spaceship.
A Proper Spaceship
This starts to show how complex the Life environment can be.