The irRegular Game of Life

[Mistery]

(puzzle)
Your task is to add cells, and let the population grow to the required number of cells after a certain number of generations. The first levels are rather easy, and you get hints, after that the game becomes more and more challenging.
Good luck!

Play Here

Please use spoilers to give hints:
[spoiler=Title Here]Enter text here...[/spoiler]

[Crimsonthread]

Stuck already on level 15.

[jack]

That was a fun game.

BTW - If anybody needs help on 42

You need 42 left after one generation

If you just want the solution

Put one dot at the bottom of the F

[machine head]

cannot pass level 19 - any help?

[jack]

Just make another L shape

[TheDoctor101]

Need help on level 17! Please help.