diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..3a057cabf8 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -59,6 +59,38 @@
 
 <script>
 
+  // check if the key pressed has an audio associated and play it
+  function playSound(event) {
+    const audio = document.querySelector(`audio[data-key="${event.keyCode}"]`);
+    const key = document.querySelector(`.key[data-key="${event.keyCode}"]`);
+    // if no audio corresponding to key pressed, stop.
+    if(!audio) return;
+
+    // rewind audio and play
+    audio.currentTime = 0;
+    audio.play();
+
+    // add playing class
+    key.classList.add('playing');
+  }
+
+  // removes the transition effect when a key is pressed, after its transition
+  // ends
+  function removeTransition(event) {
+    // we only care for transform transitions
+    if (event.propertyName !== 'transform') return;
+
+    // remove the playing class
+    console.log(this);
+    this.classList.remove('playing');
+  }
+
+  // add a listener for transitionend event for each key of the drum kit
+  const keys = document.querySelectorAll('.key');
+  keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+
+  // call playSound when a key is pressed down
+  window.addEventListener('keydown', playSound);
 </script>
 
 
diff --git a/02 - JS + CSS Clock/index-START.html b/02 - JS + CSS Clock/index-START.html
index 2712384201..c34a2cf38e 100644
--- a/02 - JS + CSS Clock/index-START.html	
+++ b/02 - JS + CSS Clock/index-START.html	
@@ -61,12 +61,39 @@
       background:black;
       position: absolute;
       top:50%;
+      transform-origin: 100%;
+      transform: rotate(90deg);
+      transition: all .05s;
+      transition-timing-function: cubic-bezier(0.69, 3.32, 0.58, 1);
     }
 
   </style>
 
   <script>
+    // query each hand element
+    const secondHand = document.querySelector('.second-hand');
+    const minHand = document.querySelector('.min-hand');
+    const hourHand = document.querySelector('.hour-hand');
 
+    function setDate() {
+      const now = new Date();
+      const seconds = now.getSeconds();
+      // we add 90 because of the offset to start the hand vertically
+      const secondsDegrees = seconds*6 + 90;
+      secondHand.style.transform = `rotate(${secondsDegrees}deg)`;
+
+      const mins = now.getMinutes();
+      const minsDegrees = mins*6 + 90;
+      minHand.style.transform = `rotate(${minsDegrees}deg)`;
+
+      const hours = now.getHours();
+      const hoursDegrees = hours*30 + 90;
+      hourHand.style.transform = `rotate(${hoursDegrees}deg)`;
+
+    }
+
+    // update the time each second
+    setInterval(setDate, 1000);
 
   </script>
 </body>