Computercraft script - client to control turtle

client

running = true
modem = peripheral.wrap("back")
modem.open(1)

while true do
  io.write(">")
  command = io.read()
  
  modem.transmit(0, 1, command)
  local event, modemSide, senderChannel, 
      replyChannel, message, senderDistance = os.pullEvent("modem_message")
  print(message)
  if command == "quit" then
    break
  end
end
running = false