diff --git a/docs/projects/red-light-green-light.md b/docs/projects/red-light-green-light.md
index f04b748b..04bbdc65 100644
--- a/docs/projects/red-light-green-light.md
+++ b/docs/projects/red-light-green-light.md
@@ -212,3 +212,8 @@ Does the movement check work? Try changing the ``100`` value to tune the detecti
 
 * Use ``||music:ring tone||`` to play a tone while in green mode.
 * Use the packet signal strength to detect that you've reached the stoplight.
+
+
+```package
+radio
+```
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