alarm.py

active = device.active
inactive = lambda: not active()
while inactive():
	yield
active_init_blip(device)
statewait(inactive, timeout=initiation_timeout)
if inactive():
	inactive_blip(device)
	return
active_running_blip(device)
statewait(inactive_reset, timeout=warning_timeout)
while active():
	if device.triggered():
		statewait(inactive, timeout=warning_timeout)	# Give a chance to turn it off.
		if active():
			warning_blip(device)
			statewait(inactive, timeout=trigger_timeout)
		if inactive():
			inactive_blip(device)
			return
		starthonk(device)	# ALARM: intruder alert!
		statewait(inactive, timeout=siren_timeout)
		stophonk(device)
		device.triggered(False)
inactive_blip(device)