Mine No Torch w/ Fuel

local args = {...}

local depth = 65/3
local stripLength = 22
local count = 0
local line = 0

if not #args == 0 then
  print("Usage: hole")
  return
end

function strip()
  count = 0
    while turtle.detectDown() do
      turtle.digDown()
      sleep(0.2)
    end
    while turtle.detectUp() do
      turtle.digUp()
      sleep(0.2)
    end
  for i=1,stripLength do
    checkFuel(stripLength)
    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
end

function checkInv()
  isFull = true

  for i=1,15 do
    if turtle.getItemCount(i) == 0 then
      isFull = false
    end
  end

  if isFull == true then
    emptyInv()
  end
end

function checkFuel(count)
  if turtle.getFuelLevel() <= count then
    print("Error: Low fuel")
    for i=1,15 do
      turtle.select(i)
      turtle.refuel()
    end
    turtle.select(1)
  end
end

function emptyInv()
    turtle.select(16)
    while not turtle.placeUp() do turtle.digUp() end
    for i=1,15 do
        turtle.select(i)
        turtle.dropUp()
    end
    turtle.select(1)
end

for q=1, depth do
for x=1,(stripLength/2) do
  turtle.turnLeft()
  strip()
  turtle.turnRight()

  while not turtle.forward() do turtle.dig() end
    while turtle.detectUp() do
      turtle.digUp()
      sleep(0.2)
  end
  turtle.turnRight()

  strip()
  turtle.turnLeft()
  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
end

turtle.turnLeft()
turtle.turnLeft()
turtle.forward()
for x=1,3 do
    while not turtle.down() do turtle.digDown() end
end
turtle.turnRight()
end

emptyInv()