code: import java.awt.*;
  import javax.swing.*;
  
  public class PinstripeDisplay extends JPanel {
  
      final int bands = 4;
  
      public PinstripeDisplay() {
          setPreferredSize(new Dimension(900, 600));
      }
  
      @Override
      public void paintComponent(Graphics g) {
          super.paintComponent(g);
          int h = getHeight();
          for (int b = 1; b <= bands; b++) {
              for (int x = 0, colIndex = 0; x < getWidth(); x += b, colIndex++) {
                  g.setColor(colIndex % 2 == 0 ? Color.white : Color.black);
                  g.fillRect(x, (b - 1) * (h / bands), x + b, b * (h / bands));
              }
          }
      }
  
      public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
              @Override
              public void run() {
                  JFrame f = new JFrame();
                  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                  f.setTitle("PinstripeDisplay");
                  f.add(new PinstripeDisplay(), BorderLayout.CENTER);
                  f.pack();
                  f.setLocationRelativeTo(null);
                  f.setVisible(true);
              }
          });
      }
  }
  