public override void LateUpdate(Frame thisFrame)
 {
     if (_shootTimer <= 0)
     {
         _shootTimer = Parent.Rand.Next(1500, 3500);;
         MonsterBullet bullet = new MonsterBullet();
         bullet.Parent = Parent;
         bullet.xPos   = xPos + 10;
         bullet.yPos   = yPos + Sprite.GetLength(0) + 1;
         bullet.Start();
         Parent.GameObjects.Add(bullet);
     }
     _shootTimer--;
 }