local tArgs = {...}
local length = tonumber(tArgs[1])
local width = tArgs[2]
local enderchest = false
local torch = turtle.getItemCount(1)
local chests = turtle.getItemCount(2)
local dist = 0

if length ~= nil then
  function dump()
    if turtle.getItemCount(16)>0 then
      turtle.digDown()
      turtle.select(2)
      turtle.placeDown()
      for slot = 4,16,1 do
      turtle.select(slot)
      turtle.dropDown()
    end
    if enderchest then
      turtle.select(2)
      turtle.digDown()
    else
    chests = chests - 1
    end
    end
  end

  function digforw()
    if turtle.detect() then
      turtle.dig()
    end
    turtle.forward()
    dump()
    turtle.digUp()
    dump()
    dist = dist + 1
  end

  function home()
    turtle.turnLeft()
    turtle.turnLeft()
    if turtle.detectUp() then
      turtle.digUp()
    end
      turtle.up()
    for i=1,dist,1 do
      turtle.forward()
    end
      turtle.down()
    if torch==0 then
      print("Ran out of torches.")
    elseif chests==0 then
      print("Ran out of chests.")
    else
      print("Ran out of fuel.")
    end
    turtle.turnLeft()
    turtle.turnLeft()
  end

  function light()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.select(1)
    turtle.place()
    turtle.turnLeft()
    turtle.turnLeft()
    torch = torch - 1
  end

  local retdist = 0
  local fuel = turtle.getFuelLevel()
  function run()
    while (torch>0) and (chests>0) and (fuel>retdist) and (dist < length) do
      for i=1,12,1 do
        digforw()
      end
      light()
      retdist = dist + 14
      fuel = turtle.getFuelLevel()
    end
    home()
  end

  run()
else
  print("Please input length.")
end