Instructions: Branch Spread changes the direction in which the branches can turn(Branch Spread=45, point in direction -45 to 45). Max Hight changes the hight of the tree. Branch Growth changes the amount of branches grow Leaves Growth changes how much leaves grow(5= 1 in 5 chance, 20= 1 in 20 chance) from one branch. Click space to start generation.
This isn't the most realistic three generator, but it is cool. If you don't understand the instructions, check the code.