#reader(lib "htdp-beginner-reader.ss" "lang")((modname tilt) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ())))
(define width 320)
(define height 480)
(define-struct world (a p r))
(define initial-world (make-world 0 0 0))
(define (render-world a-world)
(place-image
(text (string-append (number->string (world-a a-world))
" "
(number->string (world-p a-world))
" "
(number->string (world-r a-world)))
20
"blue")
0
50
(empty-scene width height)))
(define (handle-orientation-change a-world new-a new-p new-r)
(make-world new-a new-p new-r))
(big-bang width height initial-world
(on-redraw render-world)
(on-tilt handle-orientation-change))