Mine_Chest

turn = false

function invent()
  if turtle.getItemCount(15) > 0 then
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.select(1)
    turtle.place()
    for k = 2, 16 do
      turtle.select(k)
      turtle.drop()
    end
    turtle.turnLeft()
    turtle.turnLeft()
  end
end

function dig()
  invent()
  turtle.dig()
  turtle.digUp()
  turtle.digDown()
end

function forward()
  while not turtle.forward() do
    turtle.dig()
    turtle.attack()
    os.sleep(0.5)
  end
end

for i = 1, 16 do
  for j = 1, 63 do
    dig()
    forward()
  end
  if i ~= 16 then
    if turn then
      turtle.turnRight()
    else
      turtle.turnLeft()
    end
    dig()
    forward()
    if turn then
      turtle.turnRight()
    else
      turtle.turnLeft()
    end
    turn = not turn
  end
end
turtle.digUp()
turtle.digDown()