turtle.refuel()
rednet.open("left")
print("")
print("Listening for commands. Press 'q' to quit...")
while true do
   local event, p1, p2, p3, p4, p5, p6 = os.pullEvent()
   if event == "key" then
      if p1 == 16 then -- 'q'
         os.sleep(0)
         return
      end
   elseif event == "rednet_message" then
      if p2 == "forward" then
         turtle.forward()
      elseif p2 == "left" then
         turtle.turnLeft()
      elseif p2 == "right" then
         turtle.turnRight()
      elseif p2 == "back" then
         turtle.back()
      end
   end
end