(= push (mac (val lst)
  (list '= lst (list 'cons val lst))
))


(= for (mac (item lst . body)
  (list 'do
    (list 'let 'for-iter lst)
    (list 'while 'for-iter
      (list 'let item '(car for-iter))
      '(= for-iter (cdr for-iter))
      (cons 'do body)
    )
  )
))


(= items (list "cat" "dog" "fox"))

(push "owl" items)
(push "cow" items)

(for x items
  (print ">" x)
)