/* ATTiny13 Wake on Switch Action Example
*
* Wake up and perform action when a switch connected on
* PB1(pin 6) is on. Blinks LED connected on PB0 (pin 5).
* INT0 is fixed on PB1, so it can't be changed.
*
* This program moves between the following states:
*
* UNKNOWN (initial state)
* Moves to WAITING_FOR_LOW or HIGH, depending on the level of PB1
*
* WAITING_FOR_LOW
* Waits for low level on PB1. On low, moves to ACTIVE.
*
* WAITING_FOR_HIGH
* Waits for high level on PB1. On high, moves to WAITING_FOR_LOW
*
* ACTIVE
* Performs action (blink 9 times on this demo)
* After the action, moves to UNKNOWN
*
*/