Placer

function checkItems()
  currentSlot = 2
  while turtle.getItemCount() < 64 and currentSlot < 17 do
    turtle.select(currentSlot)
    turtle.transferTo(1)
    turtle.select(1)
    currentSlot = currentSlot + 1
  end
  if currentSlot == 17 then
    chat.say("I ran out of items, please bring more")
    turtle.select(1)
    while turtle.getItemCount() == 0 do
      os.sleep(5)
    end
    checkItems()
  end
end

i = 1
while turtle.back() do
  turtle.place()
  i = i + 1
  if i % 50 == 0 then
    checkItems()
  end
end