require 'gtk'

window = Gtk::Window.new(Gtk::WINDOW_TOPLEVEL)

table = Gtk::Table.new(2, 2, false)

button1 = Gtk::Button.new('Hello World')
button2 = Gtk::Button.new('button2')
button3 = Gtk::Button.new('button3')

table.attach button1, 0, 1, 0, 1
table.attach button2, 1, 2, 0, 1
table.attach button3, 0, 2, 1, 2

window.add table
button1.show
button2.show
button3.show
table.show
window.show
Gtk.main