This is a simple GUI for a simple ruby class. It demonstrates how easy it is to create GUIs with visualruby. You can try visualruby by going to visualruby.net. There are more examples and tutorials there. The best way to install this program is to install visualruby first because it has all the GTK+ graphics packages that this program depends on. Go to visualruby.net to install. After you have visualruby, you can run this program, at the terminal: $ simple_ruby_gui