@@ -58,7 +58,23 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
+function playSound(e) {
+  const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
+  const key = document.querySelector(`.key[data-key="${e.keyCode}"]`);
+  if(!audio) return; // stop the function from running all together
+  audio.currentTime = 0; //rewind to the start
+  audio.play();
+  key.classList.add('playing'); // add playing class to key when clicked for animations
+}
+function removeTransition(e) {
+  if(e.propertyName !== 'transform') return; // skip it if its not a transition
 
+  this.classList.remove('playing');
+}
+
+const keys = document.querySelectorAll('.key');
+keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+window.addEventListener('keydown', playSound);
 </script>