GP7_GAMEN4_AR_Shooting_Unity/Assets/myFolder/Scripts/Spawner.cs

using System.Collections;
using UnityEngine;

public class Spawner : MonoBehaviour
{
    public GameObject enemyPrefab;
    public GameManager gameManager;

    void Start()
    {
        StartCoroutine(SpawnLoop());
    }

    void Update()
    {

    }

    IEnumerator SpawnLoop() //Spawn random Enemy around Player every 3s
    {
        while (gameManager.gameRunning)
        {
            Vector3 randomSpot = Random.onUnitSphere * 3f;
            Instantiate(enemyPrefab, randomSpot, Quaternion.identity);
            yield return new WaitForSeconds(3f);
        }
    }
}