Scripts/Rainbow/rainbow.rkt

17 lines
533 B
Racket

#lang racket
(require pict)
(require pict/color)
; The actual function
(define (rainbow . shapes)
(define colors (list red orange yellow green blue purple))
(define (cycle lst) (append (rest lst) (list (first lst))))
(define (rainbow-recursive shapes colors)
(cond
[(empty? colors) (void)]
[(print((first colors) (first shapes)))
(rainbow-recursive (cycle shapes) (rest colors))]
)
)
(rainbow-recursive shapes colors))
; Example usage
(rainbow (filled-rectangle 25 25) (filled-ellipse 25 25))