setDistance = 5
sensorSide = "left"
breakSide = "top"

p = peripheral.wrap(sensorSide)
a = false
s = false
l = false

rednet.open("right")
rednet.broadcast("trackerOnline")

while true do
	t = p.getNearbyPlayers()
	for i = 1, #t do
		if t[i].player ~= "MCRocks999" then
			if t[i].distance < setDistance then
				a = true
				l = false
				rednet.broadcast("alarmTriggered")
			else
				if a then
					if l then
						l = true
						rednet.broadcast("targetOutOfRange")
					end
				end
			end
		end
	end
	if (a) then
		if (s) then
			s = false
			rs.setOutput("left", true)
		else
			s = true
			rs.setOutput("left", false)
		end
	end
	if (rs.getInput(breakSide)) then
		a = false
		s = false
		l = false
		rs.setOutput("left", false)
		rednet.broadcast("alarmOff")
	end
	sleep(0.15)
end