fun for -> var, test, body, return    # define a for loop using recursion
(
   test(var) -> continue
   if (continue) ->
   (
      body(var) -> var
      for (var, test, body, return)
   )
   |
      return(var)
)
| for

fun upToFive (-> index, return) '<='(index, 5, return) | upToFive

for (1, upToFive) -> index, return
(
   fun countTheStars -> stars, return
   (
      'count'(stars) -> n
      '<'(n, index, return)   # continue until n = index
   )
   | countTheStars

   for ("*", countTheStars) -> prefix, return
      'str'(prefix, "*", return)
   | stars

   println(stars) ->

   'inc'(index, return)
)
| result
exit()