ControllerFade.cs

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


public class ControllerFade : MonoBehaviour
{
[Header("Componentes")]
public static ControllerFade  _instanciaFade;
private FimFase               _FimFase; 
public Image                  _imagemFade;

[Header("Cores do Fade")]
public Color                  _corInicial;
public Color                  _corFinal;
public Color                  _corInicial2;
public Color                  _corFinal2;

[Header("Configurações do Fade")]
public float                  _duracaoFade;
public bool                   _isFade;
private float                 _tempo;

    
    // Start is called before the first frame update
    void Awake()
    {
        _instanciaFade = this;
    }

    public IEnumerator inicioFade(){
        _isFade = true;
        _tempo = 0f;

        while(_tempo <= _duracaoFade){

            _imagemFade.color = Color.Lerp(_corInicial, _corFinal, _tempo / _duracaoFade);
            _tempo = _tempo + Time.deltaTime;
            yield return null;
        }
    
        _isFade = false;
    }

    public IEnumerator FinalFade(){
        _isFade = true;
        _tempo = 0f;

        while(_tempo <= _duracaoFade){

            _imagemFade.color = Color.Lerp(_corInicial2, _corFinal2, _tempo / _duracaoFade);
            _tempo += Time.deltaTime;
            yield return null;
        }

        _isFade = false;
    }


    
    void Start()
    {
        StartCoroutine(inicioFade());
    }

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