Fizzbuzz in emacs lisp. It works!

fizzbuzz.el

(defun fizzbuzz ()
  "Fizzbuzz written in elisp. Count from 1 to 100, replacing numbers mod 3 with fizz, mod 5 with buzz,
   and mod 3 and mod 5 with Fizzbuzz."
  (interactive)
  (insert "let's start this fizzbuzzin up!\n")
  (mapcar (lambda (num) 
	  (cond
           ;; if ((x % 3 == 0) && (x % 5 == 0))
	   ((and (= (% num 3) 0) (= (% num 5) 0))
	      (insert "fizzbuzz\n"))
	   ((= (% num 3) 0)
	      (insert "fizz\n"))
	   ((= (% num 5) 0)
	    (insert "buzz\n"))
           ;; default
	   (t
	    (insert (format "%s\n" num)))))
        ;; range(1, 100)
	(number-sequence 1 100)))

1. cut and paste into *Scratch*
2. C-xC-e after the definition
3. M-x fizzbuzz

Now let's see vim do that!