敵出現管理

EnemyManager.cs

using UnityEngine;
using System.Collections;

public class EnemyManager : MonoBehaviour {
    public GameObject enemyPrefab;

	// Use this for initialization
	void Start () {
        StartCoroutine(enemyGenerateSchedule());
	}
	
	// Update is called once per frame
	void Update () {
	
	}

    IEnumerator enemyGenerateSchedule() {
        // 開始と同時に出現
        Instantiate(enemyPrefab, new Vector3(-15.01379f, 18.2092f - 10f, 0),Quaternion.Euler(0, 0, 0));
        Instantiate(enemyPrefab, new Vector3(-11.07379f, 21.0792f - 10f, 0), Quaternion.Euler(0, 0, 0));
        Instantiate(enemyPrefab, new Vector3(-18.68379f, 21.1092f - 10f, 0), Quaternion.Euler(0, 0, 0));

        // 五秒後に第2波
        yield return new WaitForSeconds(5f);
        Instantiate(enemyPrefab, new Vector3(-15.01379f + 20f, 18.2092f - 10f, 0), Quaternion.Euler(0, 0, 0));
        Instantiate(enemyPrefab, new Vector3(-11.07379f + 20f, 21.0792f - 10f, 0), Quaternion.Euler(0, 0, 0));
        Instantiate(enemyPrefab, new Vector3(-18.68379f + 20f, 21.1092f - 10f, 0), Quaternion.Euler(0, 0, 0));

        // 1秒後に第3波
        yield return new WaitForSeconds(1f);
        Instantiate(enemyPrefab, new Vector3(-15.01379f + 20f, 18.2092f - 15f, 0), Quaternion.Euler(0, 0, 0));
        Instantiate(enemyPrefab, new Vector3(-11.07379f + 20f, 21.0792f - 15f, 0), Quaternion.Euler(0, 0, 0));
        Instantiate(enemyPrefab, new Vector3(-18.68379f + 20f, 21.1092f - 15f, 0), Quaternion.Euler(0, 0, 0));
    }
}