http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life :GOL

So, every form of life goes like this:

If an empty cell has a certain number of life particles, the cell fills with life.

If it doesn't have that amount, the cell empties or stays empty.

Every form of life has a rule (the numbers), the rule dictates what numbers of life the cell must have around it.

For example, HLIF has B36/S23. This means that if an empty cell has 3 or 6 cells, it will fill with HLIF. Now, if the HLIF has 2 or 3 other particles of HLIF around it, it will survive. Any other number means death.

Now, if the rule has 3 parts, then there will be X different colors of that life (depending on the third part). So, every time it is supposed to die, it gets darker into color, but still survives. When it is at its darkest, and dies

again, it disappears.

Now, you have to learn the pattern and use logic to find out whether something will move or not... Or you could just copy someone's pattern.

Get it?

(see link for sample patterns and more information)