public IEnumerator <YieldInstruction> buffer(List <enemy_base> enemys, GameObject xian) { if (enemys.Count < 1) { yield return(null); } for (int i = 0; i < 3; i++) { foreach (var enemy in enemys) { ProcessSystem.Instance.FPlayerSkill_Enemy(enemy, 0.34f); } yield return(new WaitForSeconds(0.25f)); } player.DestroyGameObject(xian); }