startup

rednet.open("left")
t = turtle

funtion listen()
  senderID, message, protocol = rednet.receive()

  write("Received: " .. message .. "\n")

  if message == "forward" then
    t.forward()
  elseif message == "back" then
    t.back()
  elseif message == "left" then
    t.turnLeft()
  elseif message == "right" then
    t.turnRight()
  elseif message == "up" then
    t.goUp()
  elseif message == "down" then
    t.goDown()
  end
end

while(true) do
  listen()
end