How do I play gameobjects in my scene from one script / Script is not working

I am using the same script on same gameobject. I had duplicated one gameobject in my scene . The problem I am having is the script the is not working the copy gameobject . The copy gameobject doesn't play any animations . Here is my script :

  using UnityEngine;
  using System.Collections;
  
   public class Enemyai : MonoBehaviour {
   public Transform player;
   static Animator anim;
       void Start () 
       {
               anim = GetComponent<Animator> ();
       }
       
       public void Stop(){
      anim.SetBool("isMoving", false);
      anim.SetBool("isAttack", false);
      anim.SetBool("isIdle", true);
      this.enabled = false;
      //Or if you want to destroy the AI script completely
      //Destroy(this)
  }
 
   
       void Update () 
       {
 
           float speed = 0.1f;
            this.transform.Translate(0,0,speed * Time.deltaTime);
 
           if (Vector3.Distance(player.position, this.transform.position) < 25f)
           {
               Vector3 direction = player.position - this.transform.position;
               direction.y = 0;
               this.transform.rotation = Quaternion.Slerp (this.transform.rotation,Quaternion.LookRotation(direction), 0.1f);
               
               anim.SetBool("isIdle",false);
               if(direction.magnitude > 2.6 )
               {
                   this.transform.Translate(0,0,0.09f);
                   anim.SetBool("isMoving",true);
                   anim.SetBool("isAttack",false);
                   }
               else
               {
                   anim.SetBool("isAttack",true);
                   anim.SetBool("isMoving",false);
                   
               }
           }
          else
          {
              anim.SetBool("isIdle",true);
              anim.SetBool("isMoving",false);
              anim.SetBool("isAttack",false);
              
          }
       
  }
 
       
  }