refactored the CountDown.cs

Signed-off-by: Manuel <manne_melo@hotmail.com>
fixed CountDown.cs

Signed-off-by: Manuel <manne_melo@hotmail.com>
Merge branch 'master' of https://github.com/refforis/Racing-Game

Conflicts:
	src/RaceGame/RaceGame/RaceGame/World.cs