What does life do??
As far as I can see, Idk what it is for.
If you are asking how it works. lets choose for example GOL
as you can see, the description says: Game Of Life: Begin 3/Stay 23
Begin 3 means if there is an empty cell surrounded by three cells of GOL, another GOL will born inside that empty cel in the next frame
Stay 23 means that if there is a cell of GOL surrounded by two OR three cells of GOL, it will survive the next frame.
Lets make an example using a simple chart ([0]=empty cell, [1]-[2]-[3]-[4]= a cell of GOL)
[0][1][0]
[2][0][3]
As you can see, this empty cell ([2][0][3]) will turn into a new cell of GOL in the next frame because it's surrounded by 3 cells, [1], [2] and [3]
Cell [2] and [3] wont survive in the next frame because cell [2] is only surrounded by one cell which is cell [1] and the same thing with cell [3] because it's only surrounded by one cell which is cell [1]
Cell [1] will survive the next frame because it's surrounded by two cells, [2] and [3]
This is what will happen in the next frame:
[0][1][0]
[0][4][0]
Lets see what will happen in the next frame:
Cell [1] will die bcause cell [1] is only surrounded by 1 cell and the same thing happens to cell [4].
Oh and if you read the description of each Game Of Life element, you will see B and S instead of Begin and Stay, that's only a shortcut.
Btw press F to move to the next frame if you didn't know that.
LIFE can be used for heating/cooling, that's really it's only use in actual simulations, apart from making cool patterns.
How it works: http://en.wikipedia.org/wiki/Conway's_Game_of_Life
or were you asking about the element attribute "life"?