Drive/ loadLine

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

public class Drive : MonoBehaviour
{

    public GameObject ControllerButton;
    public GameObject OpenTheDoorAndTurnLight;
    public GameObject DriveButton;

    // Start is called before the first frame update
    void Start()
    {
        DriveButton.SetActive(false);
        ControllerButton.SetActive(false);
    }

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

    }

    public void StartDrive()
    {
        ControllerButton.SetActive(true);
        OpenTheDoorAndTurnLight.SetActive(false);
        DriveButton.SetActive(false);
    }
}

////

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class AssyncLoad : MonoBehaviour
{
    public int scene;
    public GameObject button;
    public GameObject sliderObj;
    public Slider slider;
    //start Coroutine
    public void load()
    {
        StartCoroutine(loadscene());

    }
    //signature to event
    public void Start()
    {
        iventsistem.instance.time += load;

    }
    //routin
    IEnumerator loadscene()
    {
        button.SetActive(false);
        sliderObj.SetActive(true);

        AsyncOperation operation = SceneManager.LoadSceneAsync(scene);
        //while done
        while (!operation.isDone)
        {
            float progress = Mathf.Clamp01(operation.progress / .9f);
            slider.value = progress;
            yield return null;

        }
    }
}