proc that returns iterator

iteratorGen.nim

let
  ages = @[20, 25, 18, 32]

proc reader(lst: seq[int]): iterator(): int =
  result = iterator (): int =
    for n in lst:
      yield n

proc main() =
  let read = reader(ages)     # How to pass an argument?

  echo read()
  echo read()

# ############################################################################

when isMainModule:
  main()