;; lists.txt

(define numbers '(1 2 3 4))
(head numbers)
=> 1
(tail numbers)
=> (2 3 4)

(define names (pair 'larry (pair 'guido (pair 'matz ()))))
(head names)
=> larry
(tail names)
=> (guido matz)

(pair 1 ())
=> (1)
(pair 1 (pair 2 '(3 4)))
=> (1 2 3 4)