(let fib (fun (n) {
  (let f (fun (n)
    (if (< n 2)
      n
      (+ (f (- n 1)) (f (- n 2))))))
  (f n) }))

(import std.List)

(list:forEach
  (list:iota 0 20)
  (fun (n) (print (fib n))))