import javax.swing.*;
import java.awt.*;

public class Test {
	public static void main(String[] args) {
		JFrame fenetre = new JFrame();
		int a = Integer.parseInt(args[0]);

		fenetre.setSize(500,500);
		fenetre.setLocation(100,100);
		fenetre.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		GridLayout layout = new GridLayout(a,a);
		fenetre.setLayout(layout);

		for(int i = 0; i < a*a; i++) {
			JPanel panneau = new JPanel();
			if (i%2 == 0) {
				panneau.setBackground(Color.WHITE);
			}
			else {
				panneau.setBackground(Color.CYAN);
			}
			fenetre.add(panneau);
		} 



		fenetre.setVisible(true);

	}
}