Having Arrow SOC KIT and How to add simple LED blinking C code in SD card

Dear Team,

Need simple help.

Having Arrow SOC kit and completed H/w and s/w flow available on rocketboard.

I want to do testing thru simple led blinking code and want to add in SD card.

which file need to write to SD card and which procedure i need to follow. so that my LED blinking code should work after booting SD card.

Rahul Soni