OldSalt1945:
I still don't have any idea of what the SM library accomplishes other than the obsfucation of the control structure.
I recently wrote a simple demo sketch that incorporates the concepts of the Blink Without Delay example sketch and the concept of a State machine (but not using the SM library). You may find it easier to follow.
http://forum.arduino.cc/index.php?topic=223286.0
...R