serial_upload.ex

defmodule Archiver do
  # function that handles list of items to archive
  def archive([_h | _t] =  items) do
    results =
      for item <- items do
        archive_thing(item)
      end
   results
  end

  # function to handle each individual itemd
  defp archive_thing(_t) do
    :timer.sleep(:rand.uniform(10000))
  end
end