public static void SaveScene1(Scene1 scene1)
    {
        BinaryFormatter formatter = new BinaryFormatter();
        string          path      = Application.persistentDataPath + "/scene1.data";
        FileStream      stream    = new FileStream(path, FileMode.Create);

        Scene1Data data = new Scene1Data(scene1);

        formatter.Serialize(stream, data);
        stream.Close();
    }
    public void LoadScene1()
    {
        Scene1Data data = SaveSystem.LoadScene1();

        RedKeyIsPickedUp    = data.RedKeyIsPickedUp;
        YellowKeyIsPickedUp = data.YellowKeyIsPickedUp;

        if (RedKeyIsPickedUp)
        {
            Destroy(GameObject.Find("RedKey"));
        }

        if (YellowKeyIsPickedUp)
        {
            Destroy(GameObject.Find("YellowKey"));
        }
    }
    public static Scene1Data LoadScene1()
    {
        string path = Application.persistentDataPath + "/scene1.data";

        if (File.Exists(path))
        {
            BinaryFormatter formatter = new BinaryFormatter();
            FileStream      stream    = new FileStream(path, FileMode.Open);

            Scene1Data data = formatter.Deserialize(stream) as Scene1Data;
            stream.Close();

            return(data);
        }
        else
        {
            Debug.LogError("Save file not found in " + path);
            return(null);
        }
    }