chickadee: Update code example.

1 files changed, 3 insertions, 2 deletions

diff --git a/haunt.scm b/haunt.scm
index 0545dd0..21bcfff 100644
--- a/haunt.scm
+++ b/haunt.scm
@@ -438,7 +438,8 @@ eventually 3D) games in Scheme, such as:")
       (li "REPL-driven development model"))
      (p "Here is a simple example:")
      ,(highlight-scheme
-       "(use-modules (chickadee))
+       "(use-modules (chickadee)
+             (chickadee math vector))
 
 (define sprite #f)
 
@@ -446,7 +447,7 @@ eventually 3D) games in Scheme, such as:")
   (set! sprite (load-image \"chickadee.png\")))
 
 (define (draw alpha)
-  (draw-sprite sprite (vector2 320 240)))
+  (draw-sprite sprite (vec2 320.0 240.0)))
 
 (add-hook! load-hook load)
 (add-hook! draw-hook draw)