[hardwired]

Code:

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;

public class Blinking implements Runnable {
    ImageIcon icon;
    JLabel label;
    long delay = 2000;

    public void run() {
        int counter = 0;
        while(true) {
            try {
                Thread.sleep(delay);
            } catch(InterruptedException e) {
                break;
            }
            if(counter++ % 2 == 0)
                label.setIcon(null);
            else
                label.setIcon(icon);
            label.repaint();
        }
    }

    private void start() {
        Thread thread = new Thread(this);
        thread.setPriority(Thread.NORM_PRIORITY);
        thread.start();
    }

    private JLabel getContent(BufferedImage image) {
        icon = new ImageIcon(image);
        label = new JLabel(icon, JLabel.CENTER);
        label.setBorder(BorderFactory.createEtchedBorder());
        label.setPreferredSize(label.getPreferredSize());
        return label;
    }

    public static void main(String[] args) throws IOException {
        String path = "images/hawk.jpg";
        BufferedImage image = ImageIO.read(new File(path));
        Blinking test = new Blinking();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setLayout(new GridBagLayout());
        f.add(test.getContent(image), new GridBagConstraints());
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
        test.start();
    }
}