diff --git a/01 - JavaScript Drum Kit/index.html b/01 - JavaScript Drum Kit/index.html
new file mode 100644
index 0000000000..1482ffa3ce
--- /dev/null
+++ b/01 - JavaScript Drum Kit/index.html	
@@ -0,0 +1,97 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>JS Drum Kit</title>
+  <link rel="stylesheet" href="style.css">
+</head>
+<body>
+
+
+  <div class="keys">
+    <div data-key="65" class="key">
+      <kbd>A</kbd>
+      <span class="sound">clap</span>
+    </div>
+    <div data-key="83" class="key">
+      <kbd>S</kbd>
+      <span class="sound">hihat</span>
+    </div>
+    <div data-key="68" class="key">
+      <kbd>D</kbd>
+      <span class="sound">kick</span>
+    </div>
+    <div data-key="70" class="key">
+      <kbd>F</kbd>
+      <span class="sound">openhat</span>
+    </div>
+    <div data-key="71" class="key">
+      <kbd>G</kbd>
+      <span class="sound">boom</span>
+    </div>
+    <div data-key="72" class="key">
+      <kbd>H</kbd>
+      <span class="sound">ride</span>
+    </div>
+    <div data-key="74" class="key">
+      <kbd>J</kbd>
+      <span class="sound">snare</span>
+    </div>
+    <div data-key="75" class="key">
+      <kbd>K</kbd>
+      <span class="sound">tom</span>
+    </div>
+    <div data-key="76" class="key">
+      <kbd>L</kbd>
+      <span class="sound">tink</span>
+    </div>
+  </div>
+
+  <audio data-key="65" src="sounds/clap.wav"></audio>
+  <audio data-key="83" src="sounds/hihat.wav"></audio>
+  <audio data-key="68" src="sounds/kick.wav"></audio>
+  <audio data-key="70" src="sounds/openhat.wav"></audio>
+  <audio data-key="71" src="sounds/boom.wav"></audio>
+  <audio data-key="72" src="sounds/ride.wav"></audio>
+  <audio data-key="74" src="sounds/snare.wav"></audio>
+  <audio data-key="75" src="sounds/tom.wav"></audio>
+  <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;
+  audio.currentTime = 0;
+  audio.play();
+  key.classList.add('playing');
+}
+
+function playSoundOnClick(e){
+  keyCode = e.target.closest(".key").dataset.key;
+  const audio = document.querySelector(`audio[data-key="${keyCode}"]`);
+  const key = document.querySelector(`.key[data-key="${keyCode}"]`);
+  if(!audio) return;
+  audio.currentTime = 0;
+  audio.play();
+  key.classList.add('playing');
+  console.log(keyCode);
+}
+
+function removeTransition(e) {
+  if(e.propertyName !== 'transform') return;
+  this.classList.remove('playing');
+}
+
+const keys = document.querySelectorAll('.key');
+keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+keys.forEach(key => key.addEventListener('mousedown', playSoundOnClick));
+window.addEventListener('keydown', playSound);
+
+</script>
+
+
+</body>
+</html>
diff --git a/02 - JS and CSS Clock/index.html b/02 - JS and CSS Clock/index.html
new file mode 100644
index 0000000000..79b413872b
--- /dev/null
+++ b/02 - JS and CSS Clock/index.html	
@@ -0,0 +1,100 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>JS + CSS Clock</title>
+</head>
+<body>
+
+
+    <div class="clock">
+      <div class="clock-face">
+        <div class="hand hour-hand"></div>
+        <div class="hand min-hand"></div>
+        <div class="hand second-hand"></div>
+      </div>
+    </div>
+
+
+  <style>
+    html {
+      background:#018DED url(http://unsplash.it/1500/1000?image=881&blur=50);
+      background-size:cover;
+      font-family:'helvetica neue';
+      text-align: center;
+      font-size: 10px;
+    }
+
+    body {
+      font-size: 2rem;
+      display:flex;
+      flex:1;
+      min-height: 100vh;
+      align-items: center;
+    }
+
+    .clock {
+      width: 30rem;
+      height: 30rem;
+      border:20px solid white;
+      border-radius:50%;
+      margin:50px auto;
+      position: relative;
+      padding:2rem;
+      box-shadow:
+        0 0 0 4px rgba(0,0,0,0.1),
+        inset 0 0 0 3px #EFEFEF,
+        inset 0 0 10px black,
+        0 0 10px rgba(0,0,0,0.2);
+    }
+
+    .clock-face {
+      position: relative;
+      width: 100%;
+      height: 100%;
+      transform: translateY(-3px); /* account for the height of the clock hands */
+    }
+
+    .hand {
+      width:50%;
+      height:6px;
+      background:black;
+      position: absolute;
+      top:50%;
+      transform-origin: 100%;
+      transform: rotate(90deg);
+      transition: all 0.5s;
+      transition-timing-function: cubic-bezier(0.88, -0.46, 0.29, 1.93)
+    }
+
+  </style>
+
+  <script>
+
+  const secondHand = document.querySelector('.second-hand');
+  const minuteHand = document.querySelector('.min-hand');
+  const hourHand = document.querySelector('.hour-hand');
+
+  var now = new Date();
+  var seconds = now.getSeconds();
+  var minutes = now.getMinutes();
+  var hours = now.getHours() % 12;
+  var secondDegrees = ((seconds / 60) * 360) + 90;
+  var minuteDegrees = (minutes + seconds / 60) * 6 + 90;
+  var hourDegrees = (hours + minutes / 60) * 30 + 90;
+
+  function updateClock(){
+    console.log(new Date().getSeconds());
+    secondHand.style.transform = `rotate(${secondDegrees}deg)`;
+    minuteHand.style.transform = `rotate(${minuteDegrees}deg)`;
+    hourHand.style.transform = `rotate(${hourDegrees}deg)`;
+    secondDegrees += 6;
+    minuteDegrees += 6 / 60;
+    hourDegrees += 30 / 60 / 60;
+  }
+
+  setInterval(updateClock, 1000);
+
+  </script>
+</body>
+</html>
diff --git a/03 - CSS Variables/index.html b/03 - CSS Variables/index.html
new file mode 100644
index 0000000000..dde122bfdb
--- /dev/null
+++ b/03 - CSS Variables/index.html	
@@ -0,0 +1,96 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Scoped CSS Variables and JS</title>
+</head>
+<body>
+<h2>Update CSS Variables with <span class='hl'>JS</span></h2>
+
+<div class="controls">
+  <label for="spacing">Spacing:</label>
+  <input id="spacing" type="range" name="spacing" min="10" max="200" value="10" data-sizing="px">
+
+  <label for="blur">Blur:</label>
+  <input id="blur" type="range" name="blur" min="0" max="25" value="10" data-sizing="px">
+
+  <label for="base">Base Color</label>
+  <input id="base" type="color" name="base" value="#ffc600">
+</div>
+
+<img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">
+
+<style>
+
+  :root {
+    --base: #36c445;
+    --spacing: 10px;
+    --blur: 10px;
+  }
+
+  img {
+    padding: var(--spacing);
+    background: var(--base);
+    filter: blur(var(--blur));
+  }
+
+  .hl {
+    color: var(--base);
+  }
+
+  /*
+    misc styles, nothing to do with CSS variables
+  */
+
+  body {
+    text-align: center;
+  }
+
+  body {
+    background: #193549;
+    color: white;
+    font-family: 'helvetica neue', sans-serif;
+    font-weight: 100;
+    font-size: 50px;
+  }
+
+  .controls {
+    margin-bottom: 50px;
+  }
+
+  input {
+    width:100px;
+  }
+</style>
+
+<script>
+
+
+const inputs = document.querySelectorAll('.controls input');
+
+function handleUpdate() {
+  const suffix = this.dataset.sizing || '';
+  document.documentElement.style.setProperty(`--${this.name}`, this.value + suffix);
+}
+
+inputs.forEach(input => input.addEventListener('change', handleUpdate));
+inputs.forEach(input => input.addEventListener('mousemove', handleUpdate));
+
+</script>
+
+</body>
+</html>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/04 - Array Cardio Day 1/index.html b/04 - Array Cardio Day 1/index.html
new file mode 100644
index 0000000000..41e47a730c
--- /dev/null
+++ b/04 - Array Cardio Day 1/index.html	
@@ -0,0 +1,98 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Array Cardio 💪</title>
+</head>
+<body>
+  <p><em>Psst: have a look at the JavaScript Console</em> 💁</p>
+  <script>
+    // Get your shorts on - this is an array workout!
+    // ## Array Cardio Day 1
+
+    // Some data we can work with
+
+    const inventors = [
+      { first: 'Albert', last: 'Einstein', year: 1879, passed: 1955 },
+      { first: 'Isaac', last: 'Newton', year: 1643, passed: 1727 },
+      { first: 'Galileo', last: 'Galilei', year: 1564, passed: 1642 },
+      { first: 'Marie', last: 'Curie', year: 1867, passed: 1934 },
+      { first: 'Johannes', last: 'Kepler', year: 1571, passed: 1630 },
+      { first: 'Nicolaus', last: 'Copernicus', year: 1473, passed: 1543 },
+      { first: 'Max', last: 'Planck', year: 1858, passed: 1947 },
+      { first: 'Katherine', last: 'Blodgett', year: 1898, passed: 1979 },
+      { first: 'Ada', last: 'Lovelace', year: 1815, passed: 1852 },
+      { first: 'Sarah E.', last: 'Goode', year: 1855, passed: 1905 },
+      { first: 'Lise', last: 'Meitner', year: 1878, passed: 1968 },
+      { first: 'Hanna', last: 'Hammarström', year: 1829, passed: 1909 }
+    ];
+
+    const people = ['Beck, Glenn', 'Becker, Carl', 'Beckett, Samuel', 'Beddoes, Mick', 'Beecher, Henry', 'Beethoven, Ludwig', 'Begin, Menachem', 'Belloc, Hilaire', 'Bellow, Saul', 'Benchley, Robert', 'Benenson, Peter', 'Ben-Gurion, David', 'Benjamin, Walter', 'Benn, Tony', 'Bennington, Chester', 'Benson, Leana', 'Bent, Silas', 'Bentsen, Lloyd', 'Berger, Ric', 'Bergman, Ingmar', 'Berio, Luciano', 'Berle, Milton', 'Berlin, Irving', 'Berne, Eric', 'Bernhard, Sandra', 'Berra, Yogi', 'Berry, Halle', 'Berry, Wendell', 'Bethea, Erin', 'Bevan, Aneurin', 'Bevel, Ken', 'Biden, Joseph', 'Bierce, Ambrose', 'Biko, Steve', 'Billings, Josh', 'Biondo, Frank', 'Birrell, Augustine', 'Black, Elk', 'Blair, Robert', 'Blair, Tony', 'Blake, William'];
+
+    // Array.prototype.filter()
+    // 1. Filter the list of inventors for those who were born in the 1500's
+    const fifteen = inventors.filter(inventor => inventor.year >= 1500 && inventor.year < 1600);
+    console.table(fifteen);
+
+    // Array.prototype.map()
+    // 2. Give us an array of the inventors' first and last names
+    const fullNames = inventors.map(inventor => `${inventor.first} ${inventor.last}` );
+
+    console.log(fullNames);
+
+    // Array.prototype.sort()
+    // 3. Sort the inventors by birthdate, oldest to youngest
+    const orderered = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
+
+    console.table(orderered);
+
+    // Array.prototype.reduce()
+    // 4. How many years did all the inventors live?
+    const totalYears = inventors.reduce((total, inventor) => {
+      return total + (inventor.passed - inventor.year);
+    }, 0);
+    // const yearsLived = inventors.reduce(function(sum, inventor){
+    //   return sum + (inventor.passed - inventor.year);
+    // });
+
+    console.log(totalYears);
+
+    // 5. Sort the inventors by years lived
+
+    const yearsLived = inventors.sort((a, b) => (a.passed - a.year) > (b.passed - b.year) ? 1 : -1);
+
+    console.table(yearsLived);
+
+    // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
+    // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
+    const links = Array.from(document.querySelectorAll('.mw-category-group a'));
+    const names = links
+                      .filter(link => link.textContent.includes("de"))
+                      .map(link => link.textContent);
+
+    console.log(names);
+
+    // 7. sort Exercise
+    // Sort the people alphabetically by last name
+    const lastNames = people.sort((a, b) => (a > b) ? 1 : -1);
+
+    console.table(lastNames);
+
+
+    // 8. Reduce Exercise
+    // Sum up the instances of each of these
+    const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck', 'horse' ];
+
+    const transportation = data.reduce(function(obj, item){
+      if ( !obj[item] ){
+        obj[item] = 0;
+      }
+      obj[item]++;
+      return obj;
+    }, {});
+
+    console.log(transportation);
+
+  </script>
+</body>
+</html>
diff --git a/05 - Flex Panel Gallery/index.html b/05 - Flex Panel Gallery/index.html
new file mode 100644
index 0000000000..11a60a2d31
--- /dev/null
+++ b/05 - Flex Panel Gallery/index.html	
@@ -0,0 +1,148 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Flex Panels 💪</title>
+  <link href='https://fonts.googleapis.com/css?family=Amatic+SC' rel='stylesheet' type='text/css'>
+</head>
+<body>
+  <style>
+    html {
+      box-sizing: border-box;
+      background:#ffc600;
+      font-family:'helvetica neue';
+      font-size: 20px;
+      font-weight: 200;
+    }
+    body {
+      margin: 0;
+    }
+    *, *:before, *:after {
+      box-sizing: inherit;
+    }
+
+    .panels {
+      min-height:100vh;
+      overflow: hidden;
+      display: flex;
+    }
+
+    .panel {
+      background:#6B0F9C;
+      box-shadow:inset 0 0 0 5px rgba(255,255,255,0.1);
+      color:white;
+      text-align: center;
+      align-items:center;
+      /* Safari transitionend event.propertyName === flex */
+      /* Chrome + FF transitionend event.propertyName === flex-grow */
+      transition:
+        font-size 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
+        flex 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
+        background 0.2s;
+      font-size: 20px;
+      background-size:cover;
+      background-position:center;
+      flex: 1;
+      justify-content: center;
+      align-items: center;
+      display: flex;
+      flex-direction: column;
+    }
+
+
+    .panel1 { background-image:url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500); }
+    .panel2 { background-image:url(https://source.unsplash.com/1CD3fd8kHnE/1500x1500); }
+    .panel3 { background-image:url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d); }
+    .panel4 { background-image:url(https://source.unsplash.com/ITjiVXcwVng/1500x1500); }
+    .panel5 { background-image:url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500); }
+
+    .panel > * {
+      margin:0;
+      width: 100%;
+      transition:transform 0.5s;
+      /*border: 1px solid red;*/
+      flex: 1 0 auto;
+      display: flex;
+      justify-content: center;
+      align-items: center;
+    }
+
+    .panel > *:first-child { transform: translateY(-100%)}
+    .panel.open-active > *:first-child { transform: translateY(0)}
+    .panel > *:last-child { transform: translateY(100%)}
+    .panel.open-active > *:last-child { transform: translateY(0)}
+
+    .panel p {
+      text-transform: uppercase;
+      font-family: 'Amatic SC', cursive;
+      text-shadow:0 0 4px rgba(0, 0, 0, 0.72), 0 0 14px rgba(0, 0, 0, 0.45);
+      font-size: 2em;
+    }
+    .panel p:nth-child(2) {
+      font-size: 4em;
+    }
+
+    .panel.open {
+      flex: 5;
+      font-size:40px;
+    }
+
+    .cta {
+      color:white;
+      text-decoration: none;
+    }
+
+  </style>
+
+
+  <div class="panels">
+    <div class="panel panel1">
+      <p>Hey</p>
+      <p>Let's</p>
+      <p>Dance</p>
+    </div>
+    <div class="panel panel2">
+      <p>Give</p>
+      <p>Take</p>
+      <p>Receive</p>
+    </div>
+    <div class="panel panel3">
+      <p>Experience</p>
+      <p>It</p>
+      <p>Today</p>
+    </div>
+    <div class="panel panel4">
+      <p>Give</p>
+      <p>All</p>
+      <p>You can</p>
+    </div>
+    <div class="panel panel5">
+      <p>Life</p>
+      <p>In</p>
+      <p>Motion</p>
+    </div>
+  </div>
+
+  <script>
+
+    const panels = document.querySelectorAll('.panel');
+
+    function toggleOpen(){
+      this.classList.toggle('open');
+    }
+
+    function toggleActive(e){
+      if(e.propertyName.includes('flex')){
+        this.classList.toggle('open-active');
+      }
+    }
+
+    panels.forEach(panel => panel.addEventListener('click', toggleOpen));
+    panels.forEach(panel => panel.addEventListener('transitionend', toggleActive));
+
+  </script>
+
+
+
+</body>
+</html>
diff --git a/06 - Type Ahead/index.html b/06 - Type Ahead/index.html
new file mode 100644
index 0000000000..37783fe524
--- /dev/null
+++ b/06 - Type Ahead/index.html	
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Type Ahead 👀</title>
+  <link rel="stylesheet" href="style.css">
+</head>
+<body>
+
+  <form class="search-form">
+    <input type="text" class="search" placeholder="City or State">
+    <ul class="suggestions">
+      <li>Filter for a city</li>
+      <li>or a state</li>
+    </ul>
+  </form>
+<script>
+const endpoint = 'http://localhost:8000/cities.json';
+
+const cities = [];
+
+fetch(endpoint)
+  .then(blob => blob.json())
+  .then(data => cities.push(...data));
+
+function findMatches(wordToMatch, cities){
+  return cities.filter(place => {
+    const regex = new RegExp(wordToMatch, 'gi');
+    return place.city.match(regex) || place.state.match(regex);
+  })
+}
+
+function numberWithCommas(x){
+  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
+}
+
+function displayMatches(){
+  const matchArray = findMatches(this.value, cities);
+  const html = matchArray.map(place => {
+    const regex = new RegExp(this.value, 'gi');
+    const cityName = place.city.replace(regex, `<span class="hl">${this.value}</span>`);
+    const stateName = place.state.replace(regex, `<span class="hl">${this.value}</span>`);
+    return `
+        <li>
+          <span className="name">${cityName}, ${stateName}</span>
+          <span className="population">${numberWithCommas(place.population)}</span>
+        </li>
+    `;
+  }).join('');
+  suggestions.innerHTML = html;
+}
+ 
+
+const searchInput = document.querySelector('.search');
+const suggestions = document.querySelector('.suggestions');
+
+searchInput.addEventListener('change', displayMatches);
+searchInput.addEventListener('keyup', displayMatches);
+
+</script>
+  </body>
+</html>
diff --git a/07 - Array Cardio Day 2/index.html b/07 - Array Cardio Day 2/index.html
new file mode 100644
index 0000000000..b810898e99
--- /dev/null
+++ b/07 - Array Cardio Day 2/index.html	
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Array Cardio 💪💪</title>
+</head>
+<body>
+  <p><em>Psst: have a look at the JavaScript Console</em> 💁</p>
+  <script>
+    // ## Array Cardio Day 2
+
+    const people = [
+      { name: 'Wes', year: 1988 },
+      { name: 'Kait', year: 1986 },
+      { name: 'Irv', year: 1970 },
+      { name: 'Lux', year: 2015 }
+    ];
+
+    const comments = [
+      { text: 'Love this!', id: 523423 },
+      { text: 'Super good', id: 823423 },
+      { text: 'You are the best', id: 2039842 },
+      { text: 'Ramen is my fav food ever', id: 123523 },
+      { text: 'Nice Nice Nice!', id: 542328 }
+    ];
+
+    // Some and Every Checks
+    // Array.prototype.some() // is at least one person 19 or older?
+    // const isAdult = people.some(function(person){
+    //   const currentYear = (new Date()).getFullYear();
+    //   if(currentYear - person.year >= 18){
+    //     return true;
+    //   }
+    // });
+
+    const isAdult = people.some(person => ((new Date()).getFullYear()) - person.year >= 19);
+
+    console.log({isAdult});
+
+    // Array.prototype.every() // is everyone 19 or older?
+    const allAdult = people.every(person => ((new Date()).getFullYear()) - person.year >= 19);
+
+    console.log({allAdult});
+    // Array.prototype.find()
+    // Find is like filter, but instead returns just the one you are looking for
+    // find the comment with the ID of 823423
+
+    const superGood = comments.find(comment => (comment.id == 823423));
+
+    console.log(superGood);
+
+    // Array.prototype.findIndex()
+    // Find the comment with this ID
+    // delete the comment with the ID of 823423
+
+    const index = comments.findIndex(comment => comment.id === 823423);
+    console.log({index});
+
+    const newComments = [
+      ...comments.slice(0, index),
+      ...comments.slice(index + 1)
+    ];
+
+    console.table(comments);
+    console.table(newComments)
+
+  </script>
+</body>
+</html>
diff --git a/09 - Dev Tools Domination/index.html b/09 - Dev Tools Domination/index.html
new file mode 100644
index 0000000000..6e5fe657d9
--- /dev/null
+++ b/09 - Dev Tools Domination/index.html	
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Console Tricks!</title>
+</head>
+<body>
+
+  <p onClick="makeGreen()">×BREAK×DOWN×</p>
+
+  <script>
+    const dogs = [{ name: 'Snickers', age: 2 }, { name: 'hugo', age: 8 }];
+
+    function makeGreen() {
+      const p = document.querySelector('p');
+      p.style.color = '#BADA55';
+      p.style.fontSize = '50px';
+    }
+
+    // Regular
+    console.log("Hello!");
+
+    // Interpolated
+    console.log('Hello I am a %s string!', 'interpolated');
+    console.log(`Hello I am a string in ${"ES6"}!`);
+
+    // Styled
+    console.log('%c I am very large text!', 'font-size:50px; background:red;');
+
+    // warning!
+    console.warn('END OF THE WORLD');
+
+    // Error :|
+    console.error('Lemons');
+
+    // Info
+    console.info('The sky is blue');
+
+    // Testing
+    const p = document.querySelector('p'); 
+    console.assert(p.classList.contains('ouch'), 'Must supply class \'ouch\'');
+
+    // clearing
+    // console.clear();
+
+    // Viewing DOM Elements
+    console.log(p);
+    console.dir(p);
+
+    // Grouping together
+    dogs.forEach(dog => {
+      console.groupCollapsed(`${dog.name}`);
+      console.log(`This is ${dog.name}`);
+      console.log(`${dog.name} is ${dog.age} years old`);
+      console.log(`${dog.name} is ${dog.age * 7} dog years old`);
+      console.groupEnd(`${dog.name}`);
+    })
+    // console.table(dogs);
+
+    // counting
+    console.count('Cody');
+    console.count('Cody');
+    console.count('Yibin');
+    console.count('Cody');
+    console.count('Cody');
+    console.count('Cody');
+    console.count('Yibin');
+    console.count('Yibin');
+    console.count('Yibin');
+
+    // timing
+    console.time('fetching data');
+    fetch('https://api.github.com/users/cdfuller')
+      .then(data => data.json())
+      .then(data => {
+        console.timeEnd('fetching data');
+        console.log(data);
+      })
+
+  </script>
+</body>
+</html>
