// Start is called before the first frame update
    void Start()
    {
        var          posManager = new PositionManager(kindOfEnemies, countLineEnemies, padding);
        List <float> rangeX     = posManager.GetRangeX();
        List <float> rangeY     = posManager.GetRangeY();

        for (int y = 0; y < kindOfEnemies; y++)
        {
            for (int x = 0; x < countLineEnemies; x++)
            {
                //縦列ごとに敵の種類を変える
                GameObject obj      = Resources.Load("nc128454_" + y) as GameObject;
                GameObject instance =
                    Instantiate(obj,
                                new Vector2(rangeX[x], rangeY[y]),
                                Quaternion.identity);

                // Enemiesの空オブジェクトを親オブジェクトにする
                instance.transform.parent = gameObject.transform;
            }
        }
    }