local directions = { [0] = "north", "west", "south", "east" }

local function readnum (file)
  local fh = fs.open(file, "r")
  if nil == fh then
    return nil
  end
  tmp = tonumber(fh.readLine())
  fh.close()
  return tmp
end

local function write (file, data)
  local fh = fs.open(file, "w")
  if nil == fh then
    return
  end
  fh.writeLine(data)
  fh.close()
end

direction = readnum("facing")
print(direction)
print("facing " .. directions[direction])
os.pullEvent("key")

repeat
  direction = (direction + 1) % 4
  write("facing", direction)
  turtle.turnLeft()
until cows_come_home