random cat slideshow.rkt

;; 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 |random cat slideshow|) (read-case-sensitive #t) (teachpacks ((lib "image.rkt" "teachpack" "2htdp") (lib "universe.rkt" "teachpack" "2htdp"))) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ((lib "image.rkt" "teachpack" "2htdp") (lib "universe.rkt" "teachpack" "2htdp")) #f)))
(define width 1024)
(define height 768)
(define half-h (/ height 2))
(define half-w (/ width 2))

(define blank-scene (empty-scene width height))

(define (random-cat w h) (bitmap/url (string-append "http://theoldreader.com/kittens/" (number->string w) "/" (number->string h) "/")))

(define (animation f)
  (place-image (random-cat width height) half-w half-h blank-scene))

(animate animation)