MFR Spawner turtle

rednet.open("right")
msg = "spawner"
side = "front"
reversed = true
active = false

function update()
	if reversed then
		rs.setOutput(side,not active)
	else
		rs.setOutput(side,active)
	end
end

function replace(num)
	turtle.suck()
	turtle.select(num)
	turtle.drop()
end

update()

while true do
	event,id,message = os.pullEvent()
	if event == "rednet_message" then
		print("Got message: "..message)
		if message == msg.." on" then
			active = true
			update()
			print("Turned on.")
			rednet.broadcast(msg.." on.")
		elseif message == msg.." off" then
			active = false
			update()
			print("Turned off.")
			rednet.broadcast(msg.." off.")
		elseif string.sub(message, 0, 4) == "pick" then
			replace(tonumber(string.sub(message, 6, 6)))
		end
	end
end