You can get Leopard from www.softpedia.com
in the programming section.
It is simple, REALLY SIMPLE and the tutorials tell you how it works.
A simple command to create a window would go like this:
Window - Tells the program to make a window
The numbers are the dimensions of the window.
But the language is a waste of time. Try C, it's quite easy and you can make good programs.
Get the Dev-C++ compiler (can't remember the site) to make C or C++ programs.