Mine No Torch No Fuel

local args = {...}

local stripLength = 35
local count = 0
local line = 0

if not #args == 1 then
  print("Usage: smine <mines>")
  return
end

function strip()
  count = 0
  for i=1,stripLength do
    count = count + 1
    checkInv()
    while not turtle.forward() do turtle.dig() end
    while turtle.detectUp() do
      turtle.digUp()
      sleep(0.2)
    end
    while turtle.detectDown() do
      turtle.digDown()
      sleep(0.2)
    end
  end

  turtle.turnLeft()
  turtle.turnLeft()

  for i=1,stripLength do
    while not turtle.forward() do turtle.dig() end
  end
end

function checkInv()
  isFull = true

  for i=1,14 do
    if turtle.getItemCount(i) == 0 then
      isFull = false
    end
  end

  if isFull == true then
    turtle.select(15)
    while not turtle.placeDown() do turtle.digDown() end
    for i=1,14 do
      turtle.select(i)
      turtle.dropDown()
    end
    turtle.select(15)
    turtle.digDown()
    sleep(0.2)
    turtle.select(1)
  end
end

function emptyInv()
    turtle.select(15)
    while not turtle.placeDown() do turtle.digDown() end
    for i=1,14 do
        turtle.select(i)
        turtle.dropDown()
    end
    turtle.select(15)
    turtle.digDown()
    sleep(0.2)
    turtle.select(1)
end

for x=1,args[1] do
  turtle.turnLeft()
  strip()
  strip()
  turtle.turnRight()
  while not turtle.forward() do turtle.dig() end
    while turtle.detectUp() do
      turtle.digUp()
      sleep(0.2)
    end
    while turtle.detectDown() do
      turtle.digDown()
    end
  line = line + 1
print("Mined " .. x .. ", " .. args[1]-x .. " left to go.")
end
emptyInv()