processing library paypal

[eluser]konank[/eluser]
heloo,,
im using this library for integrated codeigniter and paypal,
https://www.x.com/devzone/articles/paypa...-framework

this is a demo:
http://www.angelleye.com/demo/codeignite...yment_demo

So,
how the next step??
please share a simple code,

thanks before,

andrey..