Spawn origin point!!

Hi there.. so I have created an object that spawns hazards continuously in a loop.. you can control how wide the spawn length is.. but you i can't seem to move it around.. here is the code i've written.

using UnityEngine; using System.Collections;

public class CloudScript : MonoBehaviour { public GameObject hazard; public Vector3 spawnValues; public int rainCount; public float spawnWait; public float startWait;

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

 IEnumerator SpawnWaves ()
 {
     yield return new WaitForSeconds (startWait);
     while (true)
     {

         for(int i = 0; i < rainCount; i++)
         {
             Vector3 spawnPosition = new Vector3 (Random.Range (-spawnValues.x, spawnValues.x), 1, 1);
             Quaternion spawnRotation = Quaternion.identity;
             Instantiate (hazard, spawnPosition, spawnRotation);
             yield return new WaitForSeconds (spawnWait);
         }
     }    
 }

}

Here is the problem i'm facing.. the script is attached to the cloud.. but when you move the cloud.. the spawn position stays the same..