private void Awake()
 {
     LG = FindObjectOfType <level_Generator>().GetComponent <level_Generator>();
     DB = FindObjectOfType <destroy_ball>().GetComponent <destroy_ball>();
 }
 // Start is called before the first frame update
 void Start()
 {
     LG = FindObjectOfType <level_Generator>().GetComponent <level_Generator>();
 }