（スクリプト）

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ShotRod : MonoBehaviour
{
    public GameObject target;
    public GameObject rodPrefab;
    private int count;
    private float dis;
    private bool attack = false;

    void Update()
    {
        dis = Vector3.Distance(transform.position, target.transform.position);

        if(dis < 30f)
        {
            attack = true;
        }
        else
        {
            attack = false;
        }

        count += 1;

        if(count % 60 == 0 && attack)
        {
            GameObject rod = Instantiate(rodPrefab, transform.position, Quaternion.Euler(90, transform.root.rotation.y, 0));
            Rigidbody rodRb = rod.GetComponent<Rigidbody>();
            rodRb.AddForce(transform.forward * 2000);
            Destroy(rod, 5.0f);
        }
    }
}