diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..8ace49a293 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -58,6 +58,28 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
+  window.addEventListener('keydown', function(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; //Rewind the sound
+    audio.play();
+    //Add class for CSS
+    key.classList.add('playing');
+  });
+
+function removeTransition(e) {
+  if(e.propertyName !== 'transform') {
+    return;
+  }
+  console.log(e.propertyName);
+  this.classList.remove('playing');
+}
+
+const keys = document.querySelectorAll('.key');
+keys.forEach(key => key.addEventListener('transitionend', removeTransition));
 
 </script>