Fading LCD backlight

[DNewbies]

I heard from someone that it's possible to do the fading LCD backlight on nokia phone, especially the 331x. Anyone kind to show the way to do it?

p/s: fading backlight like those siemens C/M/S 35 phone

Thank you.

[theremoids]

http://nokiafree.org/forums/t9918/s.html