diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..82b39765e1 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -59,8 +59,31 @@
 
 <script>
 
+  function playSound(ev){
+    const audioTag = document.querySelector(`audio[data-key="${ev.keyCode}"]`);
+    const key = document.querySelector(`.key[data-key="${ev.keyCode}"]`);
+
+    if(!audioTag) return;
+
+    audioTag.currentTime = 0;
+    audioTag.play();
+
+    key.classList.add('playing');
+
+  };
+
+  function removeTransition(ev){
+    if(ev.propertyName !== "transform") return;
+    this.classList.remove('playing');
+  }
+
+  const keys = document.querySelectorAll('.key');
+
+  window.addEventListener('keydown',playSound);
+  keys.forEach ( key => key.addEventListener('transitionend', removeTransition));
+
 </script>
 
 
 </body>
-</html>
+</html> 
\ No newline at end of file
diff --git a/02 - JS and CSS Clock/index-START.html b/02 - JS and CSS Clock/index-START.html
index 12f721b183..75eeaf3523 100644
--- a/02 - JS and CSS Clock/index-START.html	
+++ b/02 - JS and CSS Clock/index-START.html	
@@ -62,13 +62,36 @@
       background: black;
       position: absolute;
       top: 50%;
+      transform-origin: 100%;
+      transform: rotate(90deg);
+      transition: all 0.05s;
+      transition-timing-function: cubic-bezier(0.1, 2.7, 0.58, 1);
     }
 
   </style>
 
   <script>
+    const secondHand = document.querySelector('.second-hand');
+    const minsHand = document.querySelector('.min-hand');
+    const hourHand = document.querySelector('.hour-hand');
 
+    function setDate(){
+      const now = new Date();
+      const seconds = now.getSeconds();
+      const secondsDegrees = ((seconds /60) * 360) + 90;
+      secondHand.style.transform = `rotate(${secondsDegrees}deg)`;
 
+      const mins = now.getMinutes();
+      const minsDegrees = ((mins /60) * 360 ) + 90;
+      minsHand.style.transform = `rotate(${minsDegrees}deg)`;
+
+      const hour = now.getHours();
+      const hourDegrees = ((hour / 12) * 360) + 90;
+      hourHand.style.transform = `rotate(${hourDegrees}deg)`;
+
+    }
+
+    setInterval(setDate,1000);
   </script>
 </body>
 </html>
diff --git a/03 - CSS Variables/index-START.html b/03 - CSS Variables/index-START.html
index 6b9b539c09..813690a753 100644
--- a/03 - CSS Variables/index-START.html	
+++ b/03 - CSS Variables/index-START.html	
@@ -22,9 +22,17 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
 
   <style>
 
-    /*
-      misc styles, nothing to do with CSS variables
-    */
+    :root {
+      --base: #ffc600;
+      --spacing: 10px;
+      --blur: 10px;
+    }
+
+    img {
+      padding: var(--spacing);
+      background: var(--base);
+      filter: blur(var(--blur));
+    }
 
     body {
       text-align: center;
@@ -35,6 +43,10 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
       font-size: 50px;
     }
 
+    .h1 {
+      color: var(--base);
+    }
+
     .controls {
       margin-bottom: 50px;
     }
@@ -43,8 +55,18 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
       width: 100px;
     }
   </style>
-
+    
   <script>
+    
+    function handleUpdate(){
+      const suffix = this.dataset.sizing || '';
+      document.documentElement.style.setProperty(`--${this.name}`, this.value + suffix);
+    }
+
+    const inputs = document.querySelectorAll('.controls input');
+    inputs.forEach( input => input.addEventListener('change', handleUpdate));
+    inputs.forEach( input => input.addEventListener('mousemove', handleUpdate));
+
   </script>
 
 </body>