control

rednet.open("right")
while true do
   local msg2 = "success"
   local msg = rednet.receive()
   if msg = "forward" then
      if not turtle.forward() then
         msg2 = "can't move!"
      end
   elseif msg = "back" or msg = backward then
      if not turtle.back() then
         msg2 = "can't move!"
      end
   elseif msg = "left"
      turtle.turnLeft()
   elseif msg = "right"
      turtle.turnRight()
   elseif msg = "up"
      if not turtle.up() then
         msg2 = "can't move!"
      end
   elseif nsg = "down"
      if not turtle.down() then
         msg2 = "can't move!"
      end
   elseif msg = "dig" then
      if not turtle.dig() then
         msg2 = "can't dig"
      end
   elseif msg = "digup" or msg = "digUp" then
      if not turtle.digUp() then
         msg2 = "can't digup!"
      end
   elseif msg = "digdown" or msg = "digDown" then
      if not turtle.digDown() then
         msg2 = "can't digdown!"
      end
   end
end