--opening rednet modem
rednet.open("left")
--wraping the top monitor
mon = peripheral.find("monitor_")
term.setCursorPos(1,1)
term.clear()
term.setBackgroundColor(colors.yellow)


while true do

--waiting to receive a message from the server (server > client transfer)
prot,id,msg = os.pullEvent("rednet_message")

if id == 3 then

if msg ~= "alarm" then

term.clear()
term.setCursorPos(1,1)
mon.clear()
mon.setCursorPos(1,1)
mon.setTextColor(colors.white)
mon.write("Welcome "..msg)
mon.setCursorPos(1,2)
mon.write("Have a great Day")
sleep(4)
term.clear()
term.setCursorPos(1,1)
mon.clear()
mon.setCursorPos(1,1)
else

term.clear()
term.setCursorPos(1,1)
mon.clear()
mon.setCursorPos(1,1)
mon.setTextColor(colors.red)
mon.write("Intruder Alert!")
rs.setOutput("right",true)
prot,id,msg = os.pullEvent("rednet_message")

if msg == "stop" then

term.clear()
term.setCursorPos(1,1)
mon.clear()
mon.setCursorPos(1,1)
rs.setOutput("right",false)
os.reboot()
else
print("error")

else

print(":Warning: Unauthorized transmission has been received")



end
end
end
end