diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..90ce40606f 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -58,9 +58,40 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
+window.addEventListener('keydown', playSound);
+
+function playSound(event){
+  const audio = document.querySelector(`audio[data-key="${event.keyCode}"]`);
+  const key = document.querySelector(`.key[data-key="${event.keyCode}"]`);
+  audio.currentTime = 0;
+  if (!audio) return;
+  audio.play();
+  key.classList.add('playing');
+};
+
+
+function removeTransition(event){
+  if(event.propertyName !== 'transform') return;
+  this.classList.remove('playing');
+}
+
+const keys = document.querySelectorAll('.key');
+keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+
+
 
 </script>
 
 
 </body>
 </html>
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