diff --git a/pong.py b/pong.py
index 58a5d3d..7bd6aa2 100644
--- a/pong.py
+++ b/pong.py
@@ -1,3 +1,7 @@
+# This codebase was originally posted alongside this YouTube video:
+# https://www.youtube.com/watch?v=5NkTzvMchMw
+
+
 import pygame, sys, random
 
 def reset_ball():
@@ -124,4 +128,4 @@ def animate_cpu():
 
     #Update the display
     pygame.display.update()
-    clock.tick(60)
\ No newline at end of file
+    clock.tick(60)