Hi, I have a problem with my infinite world generation script

Hi, I have a problem with my infinite world generation script, it just creates about 4 more worlds out of the prefab i made and then stops. take a look at my script below

using UnityEngine; using System.Collections.Generic;

public class GeneratorScript : MonoBehaviour { public GameObject[] availableRooms; public List currentRooms; private float screenWidthInPoints;

 public GameObject[] availableObjects;    
 public List<GameObject> objects;

 public float objectsMinDistance = 5.0f;    
 public float objectsMaxDistance = 10.0f;

 public float objectsMinY = -1.4f;
 public float objectsMaxY = 1.4f;

 public float objectsMinRotation = -45.0f;
 public float objectsMaxRotation = 45.0f;


 // Use this for initialization
 void Start () {
     float height = 2.0f * Camera.main.orthographicSize;
     screenWidthInPoints = height * Camera.main.aspect;
 }

 void AddRoom(float farhtestRoomEndX)
 {
     //1
     int randomRoomIndex = Random.Range(0, availableRooms.Length);

     //2
     GameObject room = (GameObject)Instantiate(availableRooms[randomRoomIndex]);

     //3
     float roomWidth = room.transform.FindChild("floor").localScale.x;

     //4
     float roomCenter = farhtestRoomEndX + roomWidth * 0.5f;

     //5
     room.transform.position = new Vector3(roomCenter, 0, 0);

     //6
     currentRooms.Add(room);         
 }

 void GenerateRoomIfRequired()
 {
     //1
     List<GameObject> roomsToRemove = new List<GameObject>();

     //2
     bool addRooms = true;        

     //3
     float playerX = transform.position.x;

     //4
     float removeRoomX = playerX - screenWidthInPoints;        

     //5
     float addRoomX = playerX + screenWidthInPoints;

     //6
     float farthestRoomEndX = 0;

     foreach(var room in currentRooms)
     {
         //7
         float roomWidth = room.transform.FindChild("floor").localScale.x;
         float roomStartX = room.transform.position.x - (roomWidth * 0.5f);    
         float roomEndX = roomStartX + roomWidth;                            

         //8
         if (roomStartX > addRoomX)
             addRooms = false;

         //9
         if (roomEndX < removeRoomX)
             roomsToRemove.Add(room);

         //10
         farthestRoomEndX = Mathf.Max(farthestRoomEndX, roomEndX);
     }

     //11
     foreach(var room in roomsToRemove)
     {
         currentRooms.Remove(room);
         Destroy(room);            
     }

     //12
     if (addRooms)
         AddRoom(farthestRoomEndX);
 }

 void FixedUpdate () 
 {    
     GenerateObjectsIfRequired();
     GenerateRoomIfRequired();
 }

 void GenerateObjectsIfRequired()
 {
     //1
     float playerX = transform.position.x;        
     float removeObjectsX = playerX - screenWidthInPoints;
     float addObjectX = playerX + screenWidthInPoints;
     float farthestObjectX = 0;

     //2
     List<GameObject> objectsToRemove = new List<GameObject>();

     foreach (var obj in objects)
     {
         //3
         float objX = obj.transform.position.x;

         //4
         farthestObjectX = Mathf.Max(farthestObjectX, objX);

         //5
         if (objX < removeObjectsX)            
             objectsToRemove.Add(obj);
     }

     //6
     foreach (var obj in objectsToRemove)
     {
         objects.Remove(obj);
         Destroy(obj);
     }

     //7
     if (farthestObjectX < addObjectX)
         AddObject(farthestObjectX);
 }

 void AddObject(float lastObjectX)
 {
     //1
     int randomIndex = Random.Range(0, availableObjects.Length);

     //2
     GameObject obj = (GameObject)Instantiate(availableObjects[randomIndex]);

     //3
     float objectPositionX = lastObjectX + Random.Range(objectsMinDistance, objectsMaxDistance);
     float randomY = Random.Range(objectsMinY, objectsMaxY);
     obj.transform.position = new Vector3(objectPositionX,randomY,0); 

     //4
     float rotation = Random.Range(objectsMinRotation, objectsMaxRotation);
     obj.transform.rotation = Quaternion.Euler(Vector3.forward * rotation);

     //5
     objects.Add(obj);            
 }

}