diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 4070d32767..77a3270875 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -59,6 +59,24 @@
 
 <script>
 
+  window.addEventListener('keydown', playSound);
+  const keys = document.querySelectorAll('.key');
+  keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+
+  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');
+  }
+  
 </script>
 
 
diff --git a/02 - JS + CSS Clock/index-START.html b/02 - JS + CSS Clock/index-START.html
index 2712384201..20a3e8b8fb 100644
--- a/02 - JS + CSS Clock/index-START.html	
+++ b/02 - JS + CSS Clock/index-START.html	
@@ -61,12 +61,42 @@
       background:black;
       position: absolute;
       top:50%;
+      transform: rotate(90deg);
+      transform-origin: 100%;
+      transition: all .05s;
+      transition-timing-function: cubic-bezier(0,0,0,2.7);
     }
 
   </style>
 
   <script>
 
+    const secondHand = document.querySelector('.second-hand');
+    const minuteHand = document.querySelector('.min-hand');
+    const hourHand   = document.querySelector('.hour-hand');
+
+    const now   = new Date ();
+    let seconds = now.getSeconds();
+    let minutes = now.getMinutes();
+    let hours   = now.getHours();
+
+    function setDate () {
+      seconds % 60 === 0 ? minutes++ : null;
+      minutes % 60 === 0 ? hours++ : null;
+
+      const secondDegrees = ((seconds / 60) * 360) + 90;
+      secondHand.style.transform = `rotate(${secondDegrees}deg)`;
+
+      const minuteDegrees = ((minutes / 60) * 360) + 90;
+      minuteHand.style.transform = `rotate(${minuteDegrees}deg)`;
+
+      const hourDegrees = ((hours / 12) * 360) + 90;
+      hourHand.style.transform = `rotate(${hourDegrees}deg)`;
+
+      seconds++
+    }
+
+    setInterval(setDate, 1000)
 
   </script>
 </body>
diff --git a/03 - CSS Variables/index-START.html b/03 - CSS Variables/index-START.html
index bf0f33e3ba..f108f669f0 100644
--- a/03 - CSS Variables/index-START.html	
+++ b/03 - CSS Variables/index-START.html	
@@ -1,59 +1,81 @@
 <!DOCTYPE html>
 <html lang="en">
+
 <head>
-  <meta charset="UTF-8">
-  <title>Scoped CSS Variables and JS</title>
+    <meta charset="UTF-8">
+    <title>Scoped CSS Variables and JS</title>
 </head>
-<body>
-  <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
-
-  <div class="controls">
-    <label for="spacing">Spacing:</label>
-    <input type="range" name="spacing" min="10" max="200" value="10" data-sizing="px">
-
-    <label for="blur">Blur:</label>
-    <input type="range" name="blur" min="0" max="25" value="10" data-sizing="px">
-
-    <label for="base">Base Color</label>
-    <input type="color" name="base" value="#ffc600">
-  </div>
-
-  <img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">
-
-  <style>
 
+<body>
+    <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
+    <div class="controls">
+        <label for="spacing">Spacing:</label>
+        <input type="range" name="spacing" min="10" max="200" value="10" data-sizing="px">
+        <label for="blur">Blur:</label>
+        <input type="range" name="blur" min="0" max="25" value="10" data-sizing="px">
+        <label for="base">Base Color</label>
+        <input type="color" name="base" value="#ffc600">
+    </div>
+    <img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">
+    <style>
+    :root {
+        --base: #ffc600;
+        --blur: 10px;
+        --spacing: 10px;
+    }
+    
+    img {
+        padding: var(--spacing);
+        filter: blur(var(--blur));
+        background: var(--base);
+    }
+    
+    .hl {
+        color: var(--base);
+    }
     /*
       misc styles, nothing to do with CSS variables
     */
-
+    
     body {
-      text-align: center;
+        text-align: center;
     }
-
+    
     body {
-      background: #193549;
-      color: white;
-      font-family: 'helvetica neue', sans-serif;
-      font-weight: 100;
-      font-size: 50px;
+        background: #193549;
+        color: white;
+        font-family: 'helvetica neue', sans-serif;
+        font-weight: 100;
+        font-size: 50px;
     }
-
+    
     .controls {
-      margin-bottom: 50px;
+        margin-bottom: 50px;
     }
-
+    
     a {
-      color: var(--base);
-      text-decoration: none;
+        color: var(--base);
+        text-decoration: none;
     }
-
+    
     input {
-      width:100px;
+        width: 100px;
     }
-  </style>
+    </style>
+    <script>
 
-  <script>
-  </script>
+      const inputs = document.querySelectorAll('.controls input');
+      inputs.forEach(input => {
+        input.addEventListener('change', handleUpdate);
+        input.addEventListener('mousemove', handleUpdate);
+      });
 
+      function handleUpdate(e) {
+        const suffix = this.dataset.sizing || '';
+        document.documentElement.style.setProperty(`--${this.name}`, this.value + suffix);
+      }
+
+    </script>
 </body>
+
 </html>
