while true do
  if turtle.getItemCount(1) > 0 then
    for i=2,16 do
      if turtle.getItemCount(i) == 0 then
        asdf = i
        break
      end
    end
    turtle.select(asdf)
    turtle.digDown()
    turtle.select(1)
    turtle.placeDown()
  end
  for i=2,16 do
    turtle.select(i)
    turtle.drop()
  end
  sleep(15)
end
