override def run(args: List[String]): IO[ExitCode] = {
    recurr[IO](5, List.empty)
      .flatMap { ns =>
        Iterant.fromList(ns)
      }
      .take(2)
      .map(println)
      .toListL
      .map(_ => ExitCode.Success)
  }

  def recurr[F[_]: Sync](count: Int, acc: List[Int]): Iterant[F, List[Int]] = {
    println(s"recurr($count)")
    if (count > 0) recurr(count -1, count :: acc)
    else Iterant.eval(acc)
  }

  def recurr1[F[_]: Sync](count: Int, acc: List[Int]): Iterant[F, List[Int]] = Iterant.suspend {
    println(s"recurr($count)")
    if (count > 0) recurr(count -1, count :: acc)
    else Iterant.eval(acc)
  }