Mine Done

local SLOT_COUNT = 16
local d = "north"
local width, depth, height = 10, 10, 1
local x = 0

if (#arg == 2) then
    width = tonumber(arg[1])
    depth = tonumber(arg[2])
  else
    print('No arguments given using defaults 10 x 10') -- asks for number input
end

depth = depth + 1


DROPPED_ITEMS = { -- Gets items to drop
    "minecraft:stone",
    "minecraft:dirt",
    "minecraft:cobblestone",
    "minecraft:sand",
    "minecraft:gravel",
    "minecraft:redstone",
    "minecraft:flint",
    "railcraft:ore_metal",
    "extrautils2:ingredients",
    "minecraft:dye",
    "thaumcraft:nugget",
    "thaumcraft:crystal_essence",
    "thermalfoundation:material",
    "projectred-core:resource_item",
    "thaumcraft:ore_cinnabar",
    "deepresonance:resonating_ore",
    "forestry:apatite",
    "minecraft:granite",
    "minecraft:diorite",
    "minecraft:andesite",
    "create:scoria",
    "astralsorcery:marble_raw",
    "quark:slate",
    "quark:marble",
    "#forge:cobblestone",
    "#forge:stone"
}
function dropItems() -- drops items
    print("Purging Inventory...")
    for slot = 1, SLOT_COUNT, 1 do
        local item = turtle.getItemDetail(slot) --gets details on item, if it's = to items to drop it will drop items
        if(item ~= nil) then
            for filterIndex = 1, #DROPPED_ITEMS, 1 do
                if(item["name"] == DROPPED_ITEMS[filterIndex]) then
                    print("Dropping - " .. item["name"])
                    turtle.select(slot)
                    turtle.dropDown()
                end
            end
        end
    end
end

function manageInventory()
  dropItems()
  turtle.digUp()
  turtle.digDown()
end

function checkFuel()
    turtle.select(1)

    if(turtle.getFuelLevel() < 50) then
        print("Attempting Refuel...")
        for slot = 1, SLOT_COUNT, 1 do
            turtle.select(slot)
            if(turtle.refuel(1)) then
                return true
            end
        end

        return false
    else
        return true
    end
end

function DigUp()
    while(turtle.detectUp()) do
      turtle.digUp()
      turtle.digDown()
      turtle.dig()

  end
end

function DigDown()
  while(turtle.detectDown()) do
    turtle.digUp()
    turtle.digDown()
    turtle.dig()

  end
end

function Dig()
    while(turtle.detect()) do
        turtle.digUp()
        turtle.digDown()
        turtle.dig()

    end
  end

  function detectAndDig()
    Dig()
    DigDown()
    DigUp()
  end


  function forward()
    detectAndDig()
    turtle.forward()
  end


function rightTurn()
  turtle.turnRight()
  detectAndDig()
  turtle.forward()
  turtle.turnRight()
  detectAndDig()
end


function leftTurn()
  turtle.turnLeft()
  detectAndDig()
  turtle.forward()
  turtle.turnLeft()
  detectAndDig()
end

function flipDirection()
    if(d == "north") then
        d = "south"
    elseif(d == "south") then
        d = "north"
    elseif(d == "west") then
        d = "east"
    elseif(d == "east") then
        d = "west"
    end

end

function turnAround(tier)
    if(tier % 2 == 1) then
        if(d == "north" or d == "east") then
            rightTurn()
        elseif(d == "south" or d == "west") then
            leftTurn()
        end
    else
        if(d == "north" or d == "east") then
            leftTurn()
        elseif(d == "south" or d == "west") then
            rightTurn()
        end
    end
    flipDirection()
end

function start()
    for tier = 1, height, 1 do
        for col = 1, width, 1 do
            for row = 1, depth - 1, 1 do
                if(not checkFuel()) then
                    print("Turtle is out of fuel, Powering Down...")
                    return
                end
                forward()
                print(string.format("Row: %d   Col: %d", row, col))
            end
            if(col ~= width) then
                turnAround(tier)
                x = x + 1
            end
              if (x % 2 == 0) then
                  manageInventory()
              else
                  print("Not Purging")
            end

        end

    end
end

start()