diff --git a/example-p5/JS/sketch.js b/example-p5/JS/sketch.js
index 90f5511..192a8f9 100644
--- a/example-p5/JS/sketch.js
+++ b/example-p5/JS/sketch.js
@@ -1,3 +1,5 @@
+/* based on tutorial #6: p5.js Sketch as Background @ The Code Train */
+
 var canvas;
 var mic;