I know this is likely frequently requested. To fade between colors rather than flash. The Note II does something like this during boot and shutdown. How this is accomplished should be in the source code. It might make for interesting or inspiring research.
I’d love to do this, but it’d be a battery killer as code would need to be running all the time to do the fade which would prevent the phone going into deep sleep. It’s ok for the samsung boot as it’s only running a few seconds.
The note 2 doesn't have a sleep mode as far as I can tell. From my tests with process Explorer one core is always active at 200mhz. Would that be enough to run it?