Quarry v3.0

local tArgs = {...}
if tonumber(tArgs[1]) < 0 then
  error("Must be posotive #")
elseif tonumber(tArgs[1]) == nil then
  error("Need Depth")
end
local function shaft()
  depth = 0
  while depth ~= tonumber(tArgs[1]) do
    turtle.digDown()
    turtle.down()
    depth = depth+1
    for i = 1,4 do
      turtle.turnLeft()
      turtle.dig()
    end
  end
  for i = 1,tonumber(tArgs[1]) do
    turtle.up()
  end
  turtle.select(1)
  selected = 1
  for i = 1,15 do
    turtle.dropUp()
    selected = selected+1
    turtle.select(selected)
  end
end

local function four()
  depth = 0
  while depth ~= tonumber(tArgs[1]) do
    turtle.digDown()
    turtle.down()
    depth = depth+1
    turtle.dig()
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
  end
  for i = 1,3 do
    turtle.up()
  end
  turtle.forward()
  turtle.turnLeft()
  turtle.dig()
  turtle.forward()
  for i = 1,tonumber(tArgs[1]) do
    turtle.digUp()
    turtle.up()
  end
end

--Where the digging starts
shaft()
turtle.turnLeft()
for i = 1,3 do
  turtle.forward()
end
for i = 1,3 do
  turtle.turnRight()
  shaft()
  for i = 1,3 do
    turtle.forward()
  end
end
turtle.turnRight()
turtle.forward()
turtle.turnRight()
turtle.forward()
four()