Problem with spawn object

İ found a spawn script but i couldn't do at different position. i using camera follow script. i mean first object will spawn 0,0,0 second object will spawn 20,0,0. how can do it??

code is here:

 using UnityEngine;
 using System.Collections;
  
 [RequireComponent(typeof(BoxCollider2D))]
 public class SpawnArea : MonoBehaviour {
     public GameObject spawnedPrefab;
     BoxCollider2D spawnArea;
     Vector2 maxSpawnPos;
  
     float lastSpawnTimeS = -1;
     public float spawnDelayS = 5;
  
     // Use this for initialization
     void Start () {
         spawnArea = GetComponent<BoxCollider2D>();
         spawnArea.enabled = false; //We don't need this to test for any collisions, just to show visual bounds info in the editor.
         maxSpawnPos = new Vector2(spawnArea.size.x / 2, spawnArea.size.y / 2);
     }
    
     // Update is called once per frame
     void Update () {
         if (lastSpawnTimeS < 0) {
             lastSpawnTimeS = Time.time;
             print ("spawn timer fire");
             GameObject spawned = Instantiate(spawnedPrefab, Vector3.zero, Quaternion.identity) as GameObject;
             spawned.transform.parent = transform;
             Vector3 pos = new Vector3(Random.Range(-maxSpawnPos.x, maxSpawnPos.x), Random.Range(-maxSpawnPos.y, maxSpawnPos.y), 0);
             spawned.transform.localPosition = pos;
         } else if (lastSpawnTimeS >= 0 && Time.time - lastSpawnTimeS > spawnDelayS) {
             lastSpawnTimeS = -1;
         }
     }
 }