zigzagerat

local var1 = 0 -- forward movement count
local var2 = 0 -- torch placement count
local var3 = 1 -- torch slot
local var4 = 1 -- coal slot
local var5 = 0 -- starting inventory slot
local var6 = 0 -- turning function count
local fuelLevel = 0
local torchLevel = 0

local function placeChest() -- this function makes sure that the area is ready to place the chest.
  if turtle.detectUp == true then
    turtle.digUp()
  end
  if turtle.detectDown() == true then
    turtle.up()
  end
  turtle.select(16)
  turtle.placeDown()
end

local function removeChest() -- removes chest after it's been placed
  turtle.select(16)
    if turtle.getItemCount(16) == 0 then
      turtle.digDown()
    elseif turtle.getItemCount(16) > 2 then
      turtle.dropDown()
      turtle.digDown()
    end
end

local function findTorch() -- finds torch stack in inventory
  for i = 1,12 do
    turtle.select(14)
      if turtle.compareTo(i) then
        var3 = i
      end
      turtle.select(var3)
  end
end

local function findFuel() -- finds the stack of fuel for turtle
  for i = 1,12 do
    turtle.select(15)
    if turtle.compareTo(i) then
      var4 = i
    end
    turtle.select(var4)
  end
end

local function selectTorch()
  turtle.select(var3)
end

local function selectFuel()
  turtle.select(var4)
end

local function torch() -- counts down to 8 blocks in space, then places a torch
  if true then
    var2 = var2 + 1
      if var2 == 8 then
        turtle.turnRight()
        selectTorch()
        turtle.dig()
        turtle.place()
        turtle.select(1)
        turtle.turnLeft()
        var2 = 0
      end
  end
end

local function findFirstSlot()
  if true then
    if var3 > var4 then
      var5 = var3 + 1
    elseif var3 < var4 then
      var5 = var4 + 1
    end
  end
end

local function dumpToChest()
for i = var5,13 do
  if turtle.getItemCount(13) > 0 then
    placeChest()
    turtle.select(i)
    turtle.dropDown()
  end
  removeChest()
end
end

local function refillFuel()
  if turtle.getItemCount(var4) <= 5 then
    turtle.getItemSpace(var4)
    fuelLevel = turtle.getItemSpace(var4)
    placeChest()
    turtle.select(var4)
    turtle.suckDown(fuelLevel)
    removeChest()
  end
  turtle.getFuelLevel()
  if turtle.getFuelLevel() <= 5 then
    turtle.refuel(2)
  end
end

local function refillTorch()
  if turtle.getItemCount(var3) <= 5 then
    turtle.getItemSpace(var3)
    torchLevel = turtle.getItemSpace(var3)
    placeChest()
    turtle.select(var3)
    turtle.suckDown(torchLevel)
    removeChest()
  end
end

local function inventoryManager()
  if true then
    refillTorch()
    refillFuel()
    dumpToChest()
  end
end

local function move64Forward() --moves the turtle on the y axis by 64. Also uses inventory management previously stated.
  if true then
    turtle.forward()
    inventoryManager()
    torch()
    var1 = var1 + 1
  end
end

local function tunnel() -- makes 1x3x1 tunnel
    if true then
      turtle.dig()
      turtle.forward()
      if turtle.forward() == false then
        repeat
        turtle.dig()
        sleep(0.25)
        until turtle.forward() == true
      end
      turtle.digUp()
      turtle.digDown()
    end
end

local function tunnelRight()
  turtle.turnRight()
  tunnel()
  torch()
  inventoryManager()
  tunnel()
  torch()
  inventoryManager()
  tunnel()
  torch()
  inventoryManager()
  tunnel()
  torch()
  inventoryManager()
  turtle.turnRight()
end

local function tunnelLeft()
  turtle.turnLeft()
  tunnel()
  torch()
  inventoryManager()
  tunnel()
  torch()
  inventoryManager()
  tunnel()
  torch()
  inventoryManager()
  tunnel()
  torch()
  inventoryManager()
  turtle.turnLeft()
end

local function tunnel64Forward() -- applies tunnel and forward motion as well as inventory management.
  repeat
    move64Forward()
    if not turtle.forward() then
      tunnel()
      print(var1)
    end
  until var1 >= 64
  var1 = 0
end

local function startUp()
  print("Thank you for choosing ZigZagarat as your main stripmining protacol. Please wait for startup")
  findFuel()
  findTorch()
  findFirstSlot()
end
local function movePattern()
  while true do
    tunnel64Forward()
    tunnelRight()
    tunnel64Forward()
    tunnelLeft()
  end
end
local function onKeyPress()
  while ture do
    print("Press any key to stop")
    local event = os.pullEvent()
    if event == "key" then
      return
    end
  end
end

startUp()
inventoryManager()
movePattern()