KKKKKKAAAAAAAA-BBBBBBBOOOOOOOOOOOOOMMMMMMMMMMMMMMM Completed the explosion
effect for the asteroids. The size of the explosions depend on the size of
the asteroid. The class only handles 4 active explosions at the same time,
but can be changed if needed. I also adjusted the collision for activating
the explosion only when the ship has health greater than 0.