Turning around while being on the ladder

My bad. Here it is:

 using UnityEngine;
 using System.Collections;
 using UnityStandardAssets.Characters.FirstPerson;
 
 namespace FPSSystem
 {
     public class LadderClimb : MonoBehaviour
     {
 
         public Transform chController;
         public bool inside = false;
         public float heightFactor = 3.4f;
         private FirstPersonController FPSController;
      
 
 
         void Start()
         {
             SetInitialReferences();
         }
 
         void Update()
         {
             if (inside == true && Input.GetKey("w"))
             {
                 chController.transform.position += Vector3.up / heightFactor;
             }
 
             else
 
             if (inside == true && Input.GetKey("s"))
             {
                 chController.transform.position += Vector3.down / heightFactor;
             }
           
             else
 
             if (inside == true && Input.GetKey("a"))
             {
                 chController.transform.position += Vector3.left / heightFactor;
             }
 
             else
 
             if (inside == true && Input.GetKey("d"))
             {
                 chController.transform.position += Vector3.right / heightFactor;
             }
         }
 
         void SetInitialReferences()
         {
             FPSController = GetComponent<FirstPersonController>();
         }
 
         void OnTriggerEnter(Collider col)
         {
             if (col.gameObject.tag == "Ladder")
             {
                 FPSController.enabled = false;
                 inside = !inside;
             }
         }
 
         void OnTriggerExit(Collider col)
         {
             if (col.gameObject.tag == "Ladder")
             {
                 FPSController.enabled = true;
                 inside = !inside;
             }
         }
     }
 }