import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.Timer;

import static javax.swing.SwingUtilities.invokeLater;
import static javax.swing.WindowConstants.EXIT_ON_CLOSE;

public class Test8025662 {
    private static long START = System.currentTimeMillis();

    public static void main(String[] args) {
        invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
                frame.setLayout(new GridLayout(10, 10));
                for (int i = 0; i < 100; i++) {
                    final JComponent component = new JComponent() {
                        @Override
                        protected void paintComponent(Graphics g) {
                            g.setColor(getBackground());
                            g.fillRect(0, 0, getWidth(), getHeight());
                        }
                    };
                    component.setPreferredSize(new Dimension(20, 20));
                    frame.add(component);

                    Timer timer = new Timer(16, new ActionListener() {
                        @Override
                        public void actionPerformed(ActionEvent event) {
                            long current = System.currentTimeMillis();
                            int red = (int) (current - START) % 255;
                            component.setBackground(new Color(red, 255 - red, 0));
                        }
                    });
                    timer.setInitialDelay(1000);
                    timer.start();
                }
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }
}