Test 3

local Slot_Count = 16
local x = 50
local z = 50

DROPPED_ITEMS = {
    "minecraft:stone",
    "minecraft:dirt",
    "minecraft:cobblestone",
    "minecraft:sand",
    "minecraft:gravel",
    "minecraft:flint",
    "minecraft:dye",
    "forestry:apatite"
}

function Drop_Items()
  print("Droping trash...")
  for SlotNum = 1, Slot_Count, 1 do
    local Item = turtle.getItemDetail(SlotNum)
    if(Item ~= nil) then
      for FilterIndex = 1, #DROPPED_ITEMS, 1 do
        if(Item["name"] == DROPPED_ITEMS[FilterIndex]) then
            print("Droppign - " .. Item["name"])
            turtle.select(SlotNum)
            turtle.dropDown()
          end
        end
      end
    end
  end
  -- drops unwanted items
  function GetEnderIndex()
  for SlotNum = 1, Slot_Count, 1 do
    local Item = turtle.getItemDetail(SlotNum)
    if(Item ~=nil) then
      if(Item["name"] == "enderstorage:ender_storage") then
        return SlotNum
      end
    end
  end
end
-- finds slot with ender chest
function manageInventory()
  Drop_Items()
  Index = GetEnderIndex()
  if(Index ~= nil) then
    turtle.select(Index)
    turtle.digUp()
    turtle.placeUp()
  end
  -- ender chest deployed
  for SlotNum = 1, Slot_Count, 1 do
    local Item = turtle.getItemDetail(SlotNum)
    if(Item ~=nil) then
      if(Item["name"] ~= "minecraft:coal_block" and Item["name"] ~= "actuallyadditions:block_misc") then
        turtle.select(SlotNum)
        turtle.dropUp()
      end
    end
  end
  -- Items are stored
  turtle.digUp()
end
-- thorws out trash and stores items
function GetFuelIndex()
  for SlotNum = 1, Slot_Count, 1 do
    local Item = turtle.getItemDetail(SlotNum)
    if(Item ~=nil) then
      if(Item["name"] == "minecraft:coal_block" or Item["name"] == "actuallyadditions:block_misc") then
        return SlotNum
      end
    end
  end
end
--Finds slot with fuel
function Refuel()
  if(turtle.getFuelLevel() < 400) then
  Index = GetFuelIndex()
    if(Index ~= nil) then
    turtle.select(Index)
    turtle.refuel(2)
    end
  end
end
-- Checks fuel lvl and refuels when necessary.

function Mine_Forward()
  for var = 1, x, 1 do
    turtle.dig()
    turtle.forward()
    turtle.digDown()
    turtle.digUp()
    end
end
-- mines a 1 wide by 3 tall tunnel
function Next_Row_R()
  Refuel()
  turtle.turnRight()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.digDown()
  turtle.turnRight()
end

function Next_Row_L()
  Refuel()
  turtle.turnLeft()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.digDown()
  turtle.turnLeft()
end

function Quarry()
  Refuel()
  for var = 1, z/2, 1 do
    manageInventory()
    Mine_Forward()
    Next_Row_L()
    Mine_Forward()
    Next_Row_R()
  end
end
Quarry()