How to make a simple Facebook app?

[LOL]

I just want to make a simple Facebook app that you select a friend or two and sends a notification to them. That's all. How do I do this?
Help pleaseee

[- - - - ?]

http://www.keebler.net/blog/2007/06/02/f...on-basics/

[Smith]

For facebook app you need to know about PHP because most of the facebook apps are developed on PHP.

[Dennis]

You can choose an online code editor .. no code!

http://askhowtodo.com/2009/03/how-to-cre...-language/