xdig

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

function detectUp()
while turtle.detectUp() == true do
  turtle.digUp()
  os.sleep(0.4)

  blocks = blocks + 1
  end
end

function detect()
while turtle.detect() == true do
  turtle.dig()
  os.sleep(0.4)

  blocks = blocks + 1
  end
end

function yFourLoop()
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 <= 20 then
    turtle.select(1)
    turtle.refuel(1)
  end

  if cMode == 1 then
    returnChestY()
  end

  turtle.digDown()
  turtle.down()
  detect()
  turtle.forward()
  detect()
  turtle.forward()
  detect()
  turtle.forward()

  turtle.turnRight()
  detect()
  turtle.forward()
  turtle.turnRight()

  detect()
  turtle.forward()
  detect()
  turtle.forward()
  detect()
  turtle.forward()

  turtle.turnLeft()
  detect()
  turtle.forward()
  turtle.turnLeft()

  detect()
  turtle.forward()
  detect()
  turtle.forward()
  detect()
  turtle.forward()

  turtle.turnRight()
  detect()
  turtle.forward()
  turtle.turnRight()

  detect()
  turtle.forward()
  detect()
  turtle.forward()
  detect()

  turtle.turnRight()
  turtle.forward()

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

    torchP = 0
  end

  turtle.forward()
  turtle.turnLeft()
  turtle.select(4)
  turtle.place()
  turtle.select(3)
  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
  turtle.turnRight()

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

   end
end

function returnChestY()
  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

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

  turtle.turnLeft()

  turtle.select(3)
  turtle.drop(64)

  for i = 5, 16 do
    turtle.select(i)
    turtle.drop(64)
  end

  turtle.select(3)

  turtle.turnRight()
  bTrack = backT

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

   end
end

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

    turtle.select(3)

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

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

    turtle.turnRight()
    turtle.down()

    for i = 3, 16 do
      turtle.select(i)
      turtle.drop(64)
    end

      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, y4x4, and 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()

  elseif modein == "y4x4" then
  mode = 16
  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  XXXX")
  print("@   @X   XXX  XXXX")
  print("         X@X  @XXX")
  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, torches in the second, and ladders in the fourth!")
  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()

  elseif mode == 16 then
  yFourLoop()

  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()