worker.ex

defmodule ElixirDaze.Foobar do
  require Logger

  def start_link do
    {:ok, spawn(__MODULE__, :foo, [0])}
  end

  def foo(count) do
    Logger.info(count)
    if count > 5 do
      raise "Ruh roh!"
    end

    :timer.sleep 2000
    foo(count + 1)
  end
end