[SerializeField] protected Transform target;                      // The target object to follow

public class FreeLookCam : AbstractTargetFollower

using UnityEngine;
using System.Collections;

public class df : MonoBehaviour {
   public float scrollSpeed = 0.5F;
   void Update ()
          {
    float offsetleftright = Time.time * scrollSpeed;
    float offsetforward = Time.time * scrollSpeed;
    renderer.material.SetTextureOffset("_BumpMap", new Vector2(offsetleftright, offsetforward));
   }
}