Advanced Turtle Lumberjack

-- advanced turtle lumberjack
shell.run('clear')
print("Slot1 ni Dirt, Slot2 ni Saplings, sosite Slot3 ni mokuzai wo set site kudasai.")
print("Number of Trees To Plant?")
local x = io.read()
local dirt, sapling, log = 1, 2, 3

-- genzai ichi wo shokika
turtle.up()
turtle.turnLeft()
turtle.turnLeft()
turtle.back()
turtle.back()
turtle.back()

-- saisho no tuchi wo set
for i = 0, x do
  turtle.digDown()
  turtle.select(dirt)
  turtle.placeDown()
  turtle.back()
  turtle.select(sapling)
  turtle.place()
  turtle.back()
  turtle.back()
  turtle.back()
end
turtle.turnLeft()
turtle.forward()
turtle.turnRight()

--ki wo kiru
while true do
  -- 30 byou matu
  os.sleep(30)
  -- asodatte irunara kiru , soudenakattara skip suru
  for i = 0, x do
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.turnRight()
    turtle.select(log)
    -- mosi ki ga sodatte irunara
    if turtle.compare() then
      turtle.dig()
      turtle.forward()
      -- ki wo kirirnagara ue he agaru
      while turtle.detectUp() do
      turtle.digUp()
      turtle.up()
      end
      -- jimen ni modoru
      while not turtle.detectDown() do
        turtle.down()
      end
      -- atarasii ki wo ueru
      turtle.back()
      turtle.select(sapling)
      turtle.place()
    end
    turtle.turnLeft()
  end
  -- kado wo magaru
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
end