【Unity】タグが付いたオブジェクト数を数える

TagScript.cs

using UnityEngine;
using System.Collections;

public class TagScript : MonoBehaviour {

    GameObject[] tagObjects;

    float timer = 0.0f;
    float interval = 2.0f;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {
        timer += Time.deltaTime;
        if(timer > interval){
            Check("HogeTag");
            timer = 0;
        }
    }

    //シーン上のBlockタグが付いたオブジェクトを数える
    void Check(string tagname){
        tagObjects = GameObject.FindGameObjectsWithTag(tagname);
        Debug.Log(tagObjects.Length); //tagObjects.Lengthはオブジェクトの数
        if(tagObjects.Length == 0){
            Debug.Log(tagname + "タグがついたオブジェクトはありません");
        }
    }
}