var gtk2 = require('Gtk2') -> init
 
var window = %O<Gtk2::Window>.new
var label  = %O<Gtk2::Label>.new('Goodbye, World!')
 
window.set_title('Goodbye, World!')
window.signal_connect(destroy => { gtk2.main_quit })
 
window.add(label)
window.show_all
 
gtk2.main