!7

set flag LeanMode.
//set flag Reparse.

p {
  var screens = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();
  System.out.println("Detected " + screens.length + " screen(s)");
  for (int iScreen = 0; iScreen < screens.length; iScreen++) {
    var screen = screens[iScreen].getDefaultConfiguration().getBounds();
    
    // make a grid of windows covering each screen
    
    int cols = 12, rows = 8;
    for (Rect r : concatLists(gridOfRects3(toRect(screen), cols, rows))) {
      new JWindow window;
      setBounds(window, r);
        
      // faint (mostly translucent) blue background
      window.setBackground(new Color(0, 0, 255, 64));
      
      window.setAlwaysOnTop(true);
      var label = new JLabel("Screen " + (iScreen+1) + " of " + screens.length);
      label.setHorizontalAlignment(JLabel.CENTER);
      window.add(label);
      disposeWindowOnClick(window);
      window.setVisible(true);
    }
  }
    
  System.out.println("Will exit in 10");
  Thread.sleep(10000);
  System.exit(0);
}