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

public class Damier {
	public static void main(String[] args){
		JFrame frame = new JFrame("Damier");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		int xpan = Integer.parseInt(args[0]);
		int ypan;
		ypan = xpan;

        GridLayout gestionnaire = new GridLayout(xpan, ypan);
        frame.setLayout(gestionnaire);

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

      
		frame.setSize(500,500);
		frame.setLocation(500,250);
    	frame.setVisible(true);

    }
}