public TicketMachinePanel(TicketMachine machine)
    {
      this.machine = machine; 
      setPreferredSize(new Dimension(600, 600));
      setLayout(new BorderLayout());
      
      insert = new JTextField();
      statusLabel = new JLabel("Welcome! Insert money to begin. (Press ENTER after input)");
      printbutton = new JButton("Print your ticket to Console!");