Executing Actions Through PlayerPrefs

Hey, I'm working on a game that has an "options" scene where players can change the options. I have only coded my first option: the Audio, but it doesn't seem to be working. What I want it to do is change a playerpref value when a button is clicked on, and then use that value to do different things: I have two scripts for the buttons being pressed:

 #pragma strict
 
 function OnMouseUp () 
 {
 
     PlayerPrefs.SetInt("Audio", 0);
 
 }
 
 

and I also have:

 #pragma strict
 
 function OnMouseUp () 
 {
 
     PlayerPrefs.SetInt("Audio", 1);
 
 }
 
 

The script that executes the action is :

 function Update () 
 {
 PlayerPrefs.GetInt("Audio");
 
     if Audio== 1
     {
 
     GameObject.Find("audioon").GetComponent(SpriteRenderer).enabled = false;
 
     GameObject.Find("audioon1").GetComponent(SpriteRenderer).enabled = true;
 
     GameObject.Find("audiooff").GetComponent(SpriteRenderer).enabled = true;
 
     GameObject.Find("audiooff1").GetComponent(SpriteRenderer).enabled = false;
 
     AudioListener.volume = 1;
 
     }
 
     if Audio==0
     {
 
     GameObject.Find("audioon").GetComponent(SpriteRenderer).enabled = true;
 
     GameObject.Find("audioon1").GetComponent(SpriteRenderer).enabled = false;
 
     GameObject.Find("audiooff").GetComponent(SpriteRenderer).enabled = false;
 
     GameObject.Find("audiooff1").GetComponent(SpriteRenderer).enabled = true;
 
     AudioListener.volume = 0;
     }
             
 }