27 lines
724 B
Scheme
27 lines
724 B
Scheme
(require (lib "animation.ss" "frtime")
|
|
(lib "useful-code.ss" "mztake"))
|
|
(require (lib "mztake.ss" "mztake"))
|
|
|
|
(define/bind (loc "sine.ss" '(if _) ) x sin-x)
|
|
|
|
(define (pick-cute-color x y)
|
|
(if (< 200 y)
|
|
(if (< 200 x) "blue" "darkblue")
|
|
(if (< 200 x) "red" "darkred")))
|
|
|
|
(define (make-cute-circle x y)
|
|
(make-circle (make-posn x y)
|
|
5
|
|
(pick-cute-color x y)))
|
|
|
|
(display-shapes
|
|
(list* (make-line (make-posn 0 200) (make-posn 400 200) "gray")
|
|
(make-line (make-posn 200 0) (make-posn 200 400) "gray")
|
|
|
|
(let ([x (+ 200 x)]
|
|
[sin-x (+ 200 (* 100 sin-x))])
|
|
(history-b (changes (make-cute-circle x sin-x)) 50))))
|
|
|
|
(set-running! #t)
|
|
|