Hi Yaron,
Here is a small programme for this demo board I wrote a few weeks ago.
I did this to determine what timings are needed to produce the desired flickering look of an LED.
It is about as simple as you can get, but does the job. You can add a few more internal loops in the delay subroutine to make it flash slower. Of course it would be done differently if it were part of an actual application!
Regards
David