private void timer1_Tick(object sender, EventArgs e)
        {
            timer1.Stop();

            PB1.Hide();
            PB2.Hide();
            PB3.Hide();
            PB4.Hide();
            PB5.Hide();
            PB6.Hide();
            PB7.Hide();
            PB8.Hide();
            PB9.Hide();
            PB10.Hide();
            PB11.Hide();
            PB12.Hide();

            ALbl.Hide();
            BLbl.Hide();
            CLbl.Hide();
            DLbl.Hide();
            ELbl.Hide();
            FLbl.Hide();
            GLbl.Hide();
            HLbl.Hide();
            ILbl.Hide();
            JLbl.Hide();
            KLbl.Hide();
            LLbl.Hide();

            consigneRep_Lbl.Show();
            lettre1Lbl.Show();
            lettre1TB.Show();
            lettre2Lbl.Show();
            lettre2TB.Show();
            lettre3Lbl.Show();
            lettre3TB.Show();
            ValiderBtn.Show();
        }