Strip Mine

local tArgs = { ... }
local length = 0;
if #tArgs ~= 1 then
	print("Strip Mining...")
	length = 100
else

length = tonumber( tArgs[1] )
if length < 1 then
	print( "Length must be positive" )
	return
else
  print( "Strip Mining..." )
end

end

local depth = 0
local torch = 0
local distance = 0

function sortInv()
  for i = 1, 16 do
        if turtle.getItemSpace(i) > 0 then
          turtle.select(i)
          for j = i, 16 do
                if turtle.compareTo(j) then
                  turtle.transferTo(i, turtle.getItemCount(j))
                end
          end
        end
  end
end

local function aboutFace()
  turtle.turnLeft()
  turtle.turnLeft()
end

for n=1,length do
  turtle.select(2)
  turtle.placeDown()
  turtle.select(1)
  turtle.turnLeft()
  turtle.dig()
  aboutFace()
  turtle.dig()
  while turtle.detectUp() do
    turtle.digUp()
    sleep(0.5)
  end
  turtle.up()
  turtle.dig()
  aboutFace()
  turtle.dig()
  turtle.digUp()
  while turtle.detectUp() do
    turtle.digUp()
    sleep(0.5)
  end
  turtle.up()
  turtle.dig()
  aboutFace()
  turtle.dig()
  turtle.down()
  turtle.down()
  turtle.turnLeft()
  turtle.dig()
  while turtle.detect() do
    turtle.dig()
  end
  turtle.forward()
  distance = distance + 1
  if torch == 8 then
    aboutFace()
    turtle.place()
    aboutFace()
    torch = 0
    sortInv()
  else
    torch = torch + 1
  end
  for m=3,16 do
    turtle.select(m)
    if turtle.getItemDetail() ~= nil then
      if turtle.getItemDetail().name == "minecraft:cobblestone" or turtle.getItemDetail().name == "minecraft:dirt" then
        turtle.drop()
      end
    end
  end
  if turtle.getItemCount(1) == 0 then break end
end

aboutFace()
turtle.digUp()
turtle.up()
for n=1,distance do
  if turtle.detect() then
  turtle.dig()
  turtle.forward()
  else
  turtle.forward()
  end
end

aboutFace()
print("Finished Strip Mining")
print(distance)