public AlienTiles(long period) {
super("AlienTiles");
// load the background MIDI sequence
midisLoader = new MidisLoader();
midisLoader.load("mi", "Mission_Impossible.mid");
midisLoader.play("mi", true); // repeatedly play it
Container c = getContentPane(); // default BorderLayout used
atp = new AlienTilesPanel(this, period);
c.add(atp, "Center");
addWindowListener(this);
pack();
setResizable(false);
setVisible(true);
} // end of AlienTiles() constructor
public void windowClosing(WindowEvent e) {
atp.stopGame();
midisLoader.close(); // not really required
}