private void Register()
        {
            es = new Enemy1[1];      //hardcode magic

             es[0] = new Enemy1(ENEMY_STARTING_LOCATION, Color.Azure, 0.0f, ENEMY_IMAGE_ORIGIN);    //TODO: fix up constructor.
                                        //note that this constructor is default for testing only.
                                        //each unit will DEFINITELY have a different constructor.

            base.Register(es);
        }