Well, first, welcome to TBCS! I hope you enjoy it here.
As for the problem you're having, unfortunately I'm pretty sure it's gonna be a bit more complicated than you're thinking.
First, to pinpoint what you're looking for:
hibernation == completely off but machine state saved in memory
standby == low-power state, comes back on when you hit the mouse/keyboard/etc
The blinking light behavior you're talking about is generally controlled by the MBB, sending different signals to the power LED depending on what power state the computer is in. If you're looking to get the blinky on hibernate, then you're gonna have a problem since the computer is actually powered off, and the MBB has no way of knowing that you're in 'hibernate'. Standby, however, is feasible, but if your MBB isn't already putting out that signal to your power LED, you're gonna have to fab something yourself.