;; The first three lines of this file were inserted by DrRacket. They record metadata
;; about the language level of this file in a form that our tools can easily process.
#reader(lib "htdp-beginner-reader.ss" "lang")((modname lect21-natnum-image-example) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ())))
(require 2htdp/image)

; col : natnum, image -> image
; Return `n` copies of `img` in a column.
;
(define (col n img)
  img)

(check-expect (col 0 (circle 10 'solid 'blue))
              "replace this w/ the expected result, eh?")

(check-expect (col 1 (circle 10 'solid 'blue))
              "replace this w/ the expected result, eh?")

(check-expect (col 3 (circle 10 'solid 'red))
              "replace this w/ the expected result, eh?")