receive

local m = peripheral.wrap("top")

m.open(1501)

while true do
  local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")

  if message then
    rs.setOutput("right",true)
  else
    rs.setOutput("right",false)
  end
  sleep(0.1)
end