Tree competition?

I have actually made the rules! :lol: ok so you get a birch sapling plant it and you can do anything to it apart from bone meal. E.g put water around it or glow stone for sun light.
Then there will be the night round were the rules are the same but you might need to fight mobs...
Location: outside my house, the flat lands. Possibly my mob spawned room if I'm in a bad mood.