while true do
  turtle.select(1)
  while turtle.getItemCount(1) > 0 and turtle.compareTo(16) do
    if not turtle.placeDown() then
      break
    end
    z = true
    sleep(1)
  end
  if z then
    for i = 1,15 do
      if turtle.getItemCount(i) == 1 then
        turtle.select(i)
        if not turtle.compareTo(16) then
          turtle.drop()
        end
      end
    end
  end
  sleep(15)
end
