ClockRotation.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ClockRotation : MonoBehaviour, IUseable
{
    public float rotationSpeed = 1f;
    private bool canRotate = false;
    public int clock;
    //private bool onRotation = false;

    Quaternion targetRot;


    public void Use()
    {
        canRotate = true;
        targetRot = transform.rotation * Quaternion.Euler(0f, 30f, 0);
    }


    // Update is called once per frame
    void Update()
    {
        if (canRotate)
        {
            if (clock == 12)
            {
                clock = 1;
            }
            else
            {
                clock += 1;
            }
            StartCoroutine(Rotate());
            canRotate = false;
        }

    }

    IEnumerator Rotate()
    {
        this.gameObject.GetComponent<Collider>().enabled = false;
        float elapsedTime = 0f;
        Quaternion startingPos = transform.rotation;


        while (elapsedTime < rotationSpeed)
        {
            transform.rotation = Quaternion.Lerp(startingPos, targetRot, elapsedTime / rotationSpeed);
            elapsedTime += Time.deltaTime;
            yield return null;
        }

        transform.rotation = targetRot;
        Debug.Log(clock);
        this.gameObject.GetComponent<Collider>().enabled = true;

    }
}