public Vue (){
        this.setTitle("Tetris");
        this.setSize(800, 700);
        this.setResizable(false);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        pan = new JPanel();
        pan.setBackground(Color.BLACK);
        this.setContentPane(pan);
    }