diff --git a/scripts/light.py b/scripts/light.py
index 78e9476..5e5ae3a 100644
--- a/scripts/light.py
+++ b/scripts/light.py
@@ -1,4 +1,10 @@
 #!/usr/bin/env python
+#Turn on using this command line : 
+#python3.7 path/to/file/light.py on
+
+#Turn off using this command line : 
+#python3.7 path/to/file/light.py off
+
 import RPi.GPIO as GPIO
 import sys