@@ -58,9 +58,23 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
-  window.addEventListener('keydown', function(e) {
-    console.log(e.keyCode);
-  })
+  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);
 </script>