choose texture option when lookat

Hi, I'm trying to display different textures option when I'm looking an object, then when I look at one of the option shown the object will change his texture. I've made a c# script who change the texture when I look the object but I don't know how to display the texture as an option. Thanks in advance this is my actual script:

public class Autoselect : MonoBehaviour { public Texture[] textures; public int currentTexture;

 public float timerDuration = 2f;

 private float lookTimer = 0f;

 private Renderer myRenderer;

 private MeshCollider myCollider;

 private bool isLookedAt = false;

 void Start () {
     
 }

 // Update is called once per frame
 void Update () {

     if (isLookedAt) {
         lookTimer += Time.deltaTime;
         currentTexture++;
         currentTexture %= textures.Length;
         GetComponent<Renderer>().material.mainTexture = textures [currentTexture];

         if (lookTimer > timerDuration){
             lookTimer = 0f;

             myCollider.enabled = false;
             Debug.Log ("BUTTON HAS BEEN SELECTED!");
             gameObject.SetActive (false);

         }
     }
     else {
         lookTimer = 0f;

} } public void SetGazedAt(bool gazedAt) { isLookedAt = gazedAt; } }