startup

m = peripheral.wrap("bottom")
rednet.open("top")

function stock()
   if rs.getInput("front") == false then
   rednet.send(14, "on")
   m.setBackgroundColor(colors.red)
   m.clear()
   else
   m.setBackgroundColor(colors.green)
   rednet.send(14, "off")
   m.clear()
 end
end

while true do
  stock()
  os.sleep(1)
end