private IEnumerator LoadLevel(string level, float fadeDuration)
{
sceneFade.StartFade(SceneFade.Direction.Out, fadeDuration);
yield return(new WaitForSeconds(fadeDuration));
SceneManager.LoadScene(level);
}
void Start()
{
fuelCollected = 0;
audioSource = GetComponent <AudioSource>();
sceneFade = GetComponent <SceneFade>();
sceneFade.StartFade(SceneFade.Direction.In, 0.5f);
}