diff --git a/Rect.gox b/fast/Rect.gox
similarity index 84%
rename from Rect.gox
rename to fast/Rect.gox
index 3bc775d..36a2cbd 100644
--- a/Rect.gox
+++ b/fast/Rect.gox
@@ -1,3 +1,5 @@
+package fast
+
 var (
     w, h = 10, 20
     color int