private void forward_left_buttonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_forward_left_buttonActionPerformed
        //
        try
        { 
            //
            Geometry.forwardLeft();
            //
            Thread.sleep(200);
        } 
        //
        catch (PortInUseException | IOException | InterruptedException | UnsupportedCommOperationException | NoSuchPortException ex) 
        {
            //
            Logger.getLogger(UserInterface.class.getName()).log(Level.SEVERE, null, ex);
        }
    }