Container contentPane = getContentPane();
        contentPane.setLayout(new FlowLayout());

        redButton = new JButton("RED");
        redButton.setForeground(Color.RED);
        contentPane.add(redButton);
        redButton.addActionListener(this);

    private void changeRedColor()
    {
        Container contentPane = getContentPane();
        contentPane.setBackground(Color.RED);
    }

//Vill att dessa två events triggas när den röda knappen klickas, hur gör jag?

    public void actionPerformed(ActionEvent event) {
        JButton clickedButton = (JButton) event.getSource();

        String  buttonText = clickedButton.getText();

        this.setTitle("You clicked " + buttonText);
    }


    public void actionPerformed(ActionEvent event) {
        changeRedColor();
    }