diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..fef5a03e5b 100644
--- a/01 - JavaScript Drum Kit/index-START.html
+++ b/01 - JavaScript Drum Kit/index-START.html
@@ -7,44 +7,43 @@
-
-
- A
- clap
-
-
- S
- hihat
-
-
- D
- kick
-
-
- F
- openhat
-
-
- G
- boom
-
-
- H
- ride
-
-
- J
- snare
-
-
- K
- tom
-
-
- L
- tink
-
+
+ A
+ clap
+
+
+ S
+ hihat
+
+
+ D
+ kick
+
+
+ F
+ openhat
+
+
+ G
+ boom
+
+
+ H
+ ride
+
+
+ J
+ snare
+
+
+ K
+ tom
+
+
+ L
+ tink
+
@@ -57,10 +56,25 @@
-
+ const keys = document.querySelectorAll('.key');
+ keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+