Loading animation won't play

i have an animated loading bar named "Loading77", and the question is how to load animation to this script

 using UnityEngine;
 using System.Collections;
  
 public class LoadingScreen46 : MonoBehaviour
 {
  //We make a static variable to our LoadingScreen instance
  static LoadingScreen46 instance;
  //reference to gameobject with the static image 
  GameObject loadingScreenImage;
  
  //function which executes on scene awake before the start function
  void Awake()
  {
   //find the ImageLS gameobject from the Hierarchy
   loadingScreenImage = GameObject.Find("ImageLS");
   //destroy the already existing instance, if any
   if (instance)
   {
    Destroy(gameObject);
    hide();     //call hide function to hide the 'loading Screen Sprite'
    return;
   }
   instance = this;    
   instance.loadingScreenImage.SetActive(false);
   DontDestroyOnLoad(this);  //make this object persistent between scenes
  }
  
  void Update()
  {
   //hide the loading screen if the scene is loaded
   if(!Application.isLoadingLevel)
    hide();
  }
  //function to enable the loading screen
  public static void show()
  {
   //if instance does not exists return from this function
   if (!InstanceExists()) 
   {
    return;
   }
   //enable the loading image object 
   instance.loadingScreenImage.SetActive(true);
  }
  //function to hide the loading screen
  public static void hide()
  {
   if (!InstanceExists()) 
   {
    return;
   }
   instance.loadingScreenImage.SetActive(false);
  }
  //function to check if the persistent instance exists
  static bool InstanceExists()
  {
   if (!instance)
   {
    return false;
   }
   return true;
    
  }
   
 }
 }

i get this script from http://www.thegamecontriver.com/2014/10/create-loading-scene-splash-screen-Unity-46.html , but it just load an image how do i change the image with my animation ?