xdig

local mode = 1
torchP = 0
chestR = 0
chestMode = 0
backT = 0
bTrack = 0
fFuel = turtle.getFuelLevel()

function returnChest()
  if turtle.getItemCount(3) and turtle.getItemCount(4) and turtle.getItemCount(5) and turtle.getItemCount(6) and turtle.getItemCount(7) and turtle.getItemCount(8) and turtle.getItemCount(9) and turtle.getItemCount(10) and turtle.getItemCount(11) and turtle.getItemCount(12) and turtle.getItemCount(13) and turtle.getItemCount(14) and turtle.getItemCount(15) and turtle.getItemCount(16) >= 1 then

    if fFuel <= backT * 2 then
      turtle.select(1)
      turtle.refuel(10)
    end

    bTrack = backT
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.up()

      while bTrack ~= 0 do
        bTrack = bTrack - 1
        turtle.forward()
      end

    turtle.turnRight()
    turtle.down()

      turtle.select(3)
        turtle.drop(64)
      turtle.select(4)
        turtle.drop(64)
      turtle.select(5)
        turtle.drop(64)
      turtle.select(6)
        turtle.drop(64)
      turtle.select(7)
        turtle.drop(64)
      turtle.select(8)
        turtle.drop(64)
      turtle.select(9)
        turtle.drop(64)
      turtle.select(10)
        turtle.drop(64)
      turtle.select(11)
        turtle.drop(64)
      turtle.select(12)
        turtle.drop(64)
      turtle.select(13)
        turtle.drop(64)
      turtle.select(14)
        turtle.drop(64)
      turtle.select(15)
        turtle.drop(64)
      turtle.select(16)
        turtle.drop(64)

      turtle.select(3)
    turtle.turnRight()
    turtle.up()

      while bTrack ~= backT do
        bTrack = bTrack + 1
        turtle.forward()
      end
    turtle.down()
  end
end

function cMode()
  chestIn = io.read()

  if chestIn == "y" then
    cMode = 1
    step2()

  elseif chestIn == "n" then
    cMode = 0
    step2()

  else
  stepChest()

  end
end

function stepChest()
  term.clear()
  term.setCursorPos(1,1)
  term.write("( y/n - if yes then put a double chest")
  print("")
  print("to the left of the turtle's start pos.)")
  print("")
  print("DO YOU WANT TURTLE TO RETURN TO CHEST WHEN FULL?")

  cMode()
end

function step1()
  term.clear()
  term.setCursorPos(1,1)
  term.write("(Type 1x2, 2x2. 3x3, exit)")
  print("")
  print("SELECT MODE:")

  mode()

end


function mode()
  modein = io.read()

  if modein == "exit" then
  os.reboot()

  elseif modein == "1x2" then
  mode = 2
  stepChest()

  elseif modein == "2x2" then
  mode = 4
  stepChest()

  elseif modein == "3x3" then
  mode = 9
  stepChest()

  else
  step1()

  end
end

function step2()
  term.clear()
  term.setCursorPos(1,1)
  term.write("Turtle should be in the correct pos.")
  print("")
  print("@ = turtle, X = block")
  print("")
  print("X   XX   XXX")
  print("@   @X   XXX")
  print("         X@X")
  print("")
  print("(Only numbers please 1+)")
  print("")
  print("MINE HOW MANY LAYERS:")
  layers = io.read()

  step3()

end

function step3()

torch = tonumber(layers) / 11
totalB = tonumber(layers) * mode
fuelLevel = turtle.getFuelLevel()

  term.clear()
  term.setCursorPos(1,1)
  term.write("Torches needed: "..torch)
  print("")
  print("Current fuel: "..fuelLevel)
  print("ChestReturn: "..cMode)
  print("Expected blocks to be mined: "..totalB)
  if totalB > 896 then
    print("!Warn. blocks mined > turtle inv. space!")
  end
  print("Layers: "..layers)
  print("mode: "..mode)
  print("")
  print("Make sure coal is in the first slot, and torches are in the second!")
  print("")
  print("TYPE ANYTHING TO START MINING:")

anyth = io.read()

step4()
end

function step4()
  if mode == 2 then
  oneLoop()

  elseif mode == 4 then
  twoLoop()

  elseif mode == 9 then
  threeLoop()

  else

  end
end

function oneLoop()
blocks = 0

  while layers ~= 0 do
    bMined = turtle.getItemCount(3) + turtle.getItemCount(4) + turtle.getItemCount(5) + turtle.getItemCount(6) + turtle.getItemCount(7) + turtle.getItemCount(8) + turtle.getItemCount(9) + turtle.getItemCount(10) + turtle.getItemCount(11) + turtle.getItemCount(12) + turtle.getItemCount(13) + turtle.getItemCount(14) + turtle.getItemCount(15) + turtle.getItemCount(16)
    fFuel = turtle.getFuelLevel()
    term.clear()
    term.setCursorPos(1,1)
    term.write("MINING IN PROGRESS...")
    print("")
    print("Fuel Left: "..fFuel)
    print("Blocks Mined: "..blocks)
    print("Total Items: "..bMined)
    print("Layers left: "..layers)

  if fFuel <= 1 then
    turtle.select(1)
    turtle.refuel(1)
  end

  if cMode == 1 then
    returnChest()
  end


    while turtle.detect() == true do
      turtle.dig()
      blocks = blocks + 1
      os.sleep(0.4)
    end

  turtle.forward()

    while turtle.detectUp() == true do
      turtle.digUp()
      blocks = blocks + 1
      sleep(0.4)
    end

  if turtle.detectDown() == false then
    turtle.select(3)
    turtle.placeDown()
  end

  if torchP == 10 then
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.select(2)
    turtle.place()
    turtle.turnLeft()
    turtle.turnLeft()
    torchP = 0
  end

  layers = layers - 1
  torchP = torchP + 1
  backT = backT + 1

  end
end

function twoLoop()
blocks = 0

  while layers ~= 0 do
    bMined = turtle.getItemCount(3) + turtle.getItemCount(4) + turtle.getItemCount(5) + turtle.getItemCount(6) + turtle.getItemCount(7) + turtle.getItemCount(8) + turtle.getItemCount(9) + turtle.getItemCount(10) + turtle.getItemCount(11) + turtle.getItemCount(12) + turtle.getItemCount(13) + turtle.getItemCount(14) + turtle.getItemCount(15) + turtle.getItemCount(16)
    fFuel = turtle.getFuelLevel()
    term.clear()
    term.setCursorPos(1,1)
    term.write("MINING IN PROGRESS...")
    print("")
    print("Fuel Left: "..fFuel)
    print("Blocks Mined: "..blocks)
    print("Total Items: "..bMined)
    print("Layers left: "..layers)

  if fFuel <= 3 then
    turtle.select(1)
    turtle.refuel(1)
  end

  if cMode == 1 then
    returnChest()
  end

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    sleep(0.4)
  end

  turtle.forward()

  while turtle.detectUp() == true do
    turtle.digUp()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.up()
  turtle.turnRight()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.down()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.turnLeft()

  if turtle.detectDown() == false then
    turtle.select(3)
    turtle.placeDown()
  end

  if torchP == 10 then
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.select(2)
    turtle.place()
    turtle.turnLeft()
    turtle.turnLeft()
    torchP = 0
  end

  layers = layers - 1
  torchP = torchP + 1
  backT = backT + 1

  end
end

function threeLoop()
blocks = 0

  while layers ~= 0 do
    bMined = turtle.getItemCount(3) + turtle.getItemCount(4) + turtle.getItemCount(5) + turtle.getItemCount(6) + turtle.getItemCount(7) + turtle.getItemCount(8) + turtle.getItemCount(9) + turtle.getItemCount(10) + turtle.getItemCount(11) + turtle.getItemCount(12) + turtle.getItemCount(13) + turtle.getItemCount(14) + turtle.getItemCount(15) + turtle.getItemCount(16)
    fFuel = turtle.getFuelLevel()
    term.clear()
    term.setCursorPos(1,1)
    term.write("MINING IN PROGRESS...")
    print("")
    print("Fuel Left: "..fFuel)
    print("Blocks Mined: "..blocks)
    print("Total Items: "..bMined)
    print("Layers left: "..layers)

  if fFuel <= 6 then
    turtle.select(1)
    turtle.refuel(1)
  end

  if cMode == 1 then
    returnChest()
  end

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.forward()

  while turtle.detectUp() == true do
    turtle.digUp()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.up()

  while turtle.detectUp() == true do
    turtle.digUp()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.up()
  turtle.turnRight()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.turnLeft()
  turtle.turnLeft()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.down()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.turnRight()
  turtle.turnRight()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.down()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.turnLeft()
  turtle.turnLeft()

  while turtle.detect() == true do
    turtle.dig()
    blocks = blocks + 1
    os.sleep(0.4)
  end

  turtle.turnRight()

  if turtle.detectDown() == false then
    turtle.select(3)
    turtle.placeDown()
  end

  if torchP == 10 then
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.select(2)
    turtle.place()
    turtle.turnLeft()
    turtle.turnLeft()
    torchP = 0
  end

  layers = layers - 1
  torchP = torchP + 1
  backT = backT + 1

  end
end

step1()