Quarry - Work in Progress

local tArgs = {...}

if #tArgs ~= 1 then
  print("Usage: Quarry <size>")
end

print("To Use: ")
print("Place enderchest in slot 16.")
print("Make sure the turtle has Fuel.")

local size = tArgs[1]
local depth = 0


--Functions

local function chest()
  if turtle.getItemCount(14) > 0 then
    turtle.digUp()
    turtle.select(16)
    turtle.placeUp()
    for i = 1,14 do
      turtle.select(i)
      turtle.dropUp()
    end
    turtle.select(16)
    turtle.digUp()
    turtle.select(1)
  end
end

local function forward()
  while not turtle.forward() do
    turtle.dig()
    turtle.attack()
    chest()
  end
end

local function down()
  turtle.digDown()
  turtle.down()
  depth = depth + 1
end

local function digLine()
  turtle.select(1)
  for i = 1,size-1 do
    forward()
    while turtle.detectUp() do
      turtle.digUp()
    end
    turtle.digDown()
  end
end

local function left()
  turtle.turnLeft()
  forward()
  while turtle.detectUp() do
    turtle.digUp()
  end
  turtle.digDown()
  turtle.turnLeft()
end

local function right()
  turtle.turnRight()
  forward()
  while turtle.detectUp() do
    turtle.digUp()
  end
  turtle.digDown()
  turtle.turnRight()
end

local function spin()
  turtle.turnRight()
  turtle.turnRight()
end

local function back()
  spin()
  for i = 1,size-1 do
    forward()
  end
  turtle.turnRight()
  for i = 1,size-1 do
    forward()
  end
  turtle.turnRight()
end

local function layer()
  for i = 1,size do
    digLine()
    if i%size == 0 then
      if i%2 == 0 then
        turtle.turnRight()
        for i = 1,size-1 do
          forward()
        end
        turtle.turnRight()
      else
        back()
      end
    elseif i%2 == 1 then
      right()
    else
      left()
    end
  end
end




local function quarry()
  layer()
  for i = 1,3 do
    down()
  end
end

-- Main Code


down()
down()
repeat
  quarry()
until turtle.detectDown() and not turtle.digDown()

repeat
  turtle.up()
  depth = depth - 1
until depth == 0