diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..3dd3cf7e89 100644
--- a/01 - JavaScript Drum Kit/index-START.html
+++ b/01 - JavaScript Drum Kit/index-START.html
@@ -1,10 +1,12 @@
+
JS Drum Kit
+
@@ -57,10 +59,34 @@
-
+ function playSound(e) {
+ const audio = document.querySelector('audio[data-key="' + e.keyCode + '"]');
+ const key = document.querySelector('.key[data-key="' + e.keyCode + '"]');
+
+ if (!audio) {
+ return;
+ }
+
+ audio.currentTime = 0;
+ audio.play();
+ key.classList.add('playing');
+ };
+
+ function removeTransition(e) {
+ if (e.propertyName !== 'transform') return;
+ this.classList.remove('playing');
+ };
+
+ const keys = document.querySelectorAll('.key');
+ keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+
+ window.addEventListener('keydown', playSound);
+
+
-
+
+