Has any one got the code to operate 4 x PWM led light drivers to get sunrise and sunset?

 

Instead of asking for existing code I think you'd be better off learning how to write it yourself. It's not that difficult if you put your mind to it.

 

It be hard to do with just arduino what led driving chip you going to use.
Have a look at this http://www.adafruit.com/products/14...IbmHOdAnfqOvB_hScs7LxNrSYbAzFwQ8xcaAtfk8P8HAQ

There's link to there library on the same page with samples how to use
TLC5947