Turtle

rednet.open("left")
function (rawread)
  while true do
    local sEvent, param = os.pullEvent("key")
    if sEvent == "key" then
      if param == 17 then
        rednet.broadcast("forwards")
        break
      if param == 30 then
        rednet.broadcast("left")
        break
      if param == 32 then
        rednet.broadcast("right")
        break
        if param == 31 then
        rednet.broadcast("back")
        break
      end
    end
  end
end