var gtk2 = require('Gtk2') -> init;

var window = %s'Gtk2::Window'.new;
var label  = %s'Gtk2::Label'.new('Goodbye, World!');

window.set_title('Goodbye, World!');
window.signal_connect(destroy => func(*_){ gtk2.main_quit });

window.add(label);
window.show_all;

gtk2.main;