fill

local tArgs = {...}

-- edit this line to adjust the height
local height = 33

function Place()
  start = turtle.getSelectedSlot()
  local data = turtle.getItemDetail()
  if data == nil then
    start = start + 1
    turtle.select(start)
    turtle.placeDown()
  elseif data.name ~= "minecraft:cobblestone" then
    start = start + 1
    turtle.select(start)
    turtle.placeDown()
  else
    turtle.placeDown()
  end
end

function goDown()
    for i=1, height do
       if turtle.detectDown() then
         turtle.digDown()
         turtle.down()
       else
         turtle.down()
       end
    end
end

function goUp()
    for i=1, height do
       if turtle.detectUp() then
         turtle.digUp()
         turtle.up()
         Place()
       else
         turtle.up()
         Place()
       end
    end
end

function goForward()
  if turtle.detect() then
    turtle.dig()
    turtle.forward()
  else
    turtle.forward()
  end
end

function rowCount()
    for i=1, tonumber(tArgs[1]) do
      goForward()
      goDown()
      goUp()
    end
end
rowCount()
turtle.select(1)