help calling obj from seperate obj

here is the first code

 class Previewanimation:MonoBehavior
 {
 
 string origionalAnimation;
 WrapMode wrapMode;
 
 void Awake()
 {
 //disable script
   enabled = false;
 }
 
 public void PreviewAnimation(string origionalAnimation, string animation)
 {
 //enable script
   enabled = true;
 //Save Animation Settings
   this.origionalAnimation = origionalAnimation;
   wrapMode = this.animation.wrapMode;
 //Play animation once
   this.animation.wrapMode = WrapMode.Once;
   this.animation.Play(animation);
 }
 
 void Update()
 {
   if(!animation.isPlaying)
   {
 //Restore Animation Settings
     animation.wrapMode = wrapMode;
     animation.Play(origionalAnimation);
 //disable script
     enabled = false;
 
   }
 }
 
 }
 

and i have this set up on the button i made

 using UnityEngine; using System.Collections;
 
 public class stardust_atk : MonoBehaviour { void Update() { if(!animation.isPlaying) { Previewanimation("stardust_waiting", "stardust_attack"); } } }

will appreciate all help possible