如何在Unity中用c#创建一个在x时间内生成的游戏对象，并且它在场景中

using UnityEngine;

public class ObjectSpawner : MonoBehaviour
{
    public GameObject objectPrefab;
    public float spawnDelay = 5f;
    public float objectLifetime = 10f;

    private float spawnTimer;
    private float lifetimeTimer;

    private void Start()
    {
        spawnTimer = spawnDelay;
    }

    private void Update()
    {
        // 倒计时生成游戏对象
        spawnTimer -= Time.deltaTime;
        if (spawnTimer <= 0)
        {
            SpawnObject();
            spawnTimer = spawnDelay;
        }

        // 计时游戏对象的存在时间
        lifetimeTimer += Time.deltaTime;
        if (lifetimeTimer >= objectLifetime)
        {
            DestroySpawnedObject();
            lifetimeTimer = 0f;
        }
    }

    private void SpawnObject()
    {
        // 在当前位置生成游戏对象
        Instantiate(objectPrefab, transform.position, Quaternion.identity);
    }

    private void DestroySpawnedObject()
    {
        // 销毁生成的游戏对象
        Destroy(objectPrefab);
    }
}