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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div class='board'></div>
<div class='clone'>
  <div class='face'></div>
  <div class='face'></div>
  <div class='face'></div>
  <div class='face'></div>
  <div class='face'></div>
  <div class='face'></div>
</div>
<div class='overlay hidden'>
  <div class='gameover'>
    <p>YOU WON!</p>
    <button class='reset'>
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><path d="M485.8 113.9L349.3 250.5c-3.5 3.5-3.5 9.1 0 12.6l136.6 136.6c5.6 5.6 15.2 1.6 15.2-6.3V120.2c-.1-7.9-9.7-11.9-15.3-6.3z" fill="#fff"/><path d="M500 194.8V317c125.9 0 228 102.1 228 228S625.9 773 500 773v121.8c193.3 0 350-156.7 350-350s-156.7-350-350-350zM272 545c0-55.1 19.6-105.7 52.1-145.1 6.5-7.9 5.9-19.5-1.4-26.8l-58.3-58.3c-8.2-8.2-21.7-7.7-29.3 1-53 61.5-85.1 141.5-85.1 229 0 193.3 156.7 350 350 350V773c-125.9 0-228-102.1-228-228z" fill="#fff"/></svg>
    </button>
  </div>
</div>

<!-- Preload Game Sounds -->
<audio preload="auto" class="audio-win" >
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-win.mp3">
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-win.ogg">
</audio>
<audio preload="auto" class="audio-ahahah" >
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-ahahah.mp3">
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-ahahah.ogg">
</audio>
<audio preload="auto" class="audio-dino" >
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audo-dino.mp3">
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-dino.ogg">
</audio>
<audio preload="auto" class="audio-egg" >
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-egg.mp3">
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-egg.ogg">
</audio>
<audio preload="auto" class="audio-erupt" >
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-erupt.mp3">
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-erupt.ogg">
</audio>
<audio preload="auto" class="audio-ptero" >
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-ptero.mp3">
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-ptero.ogg">
</audio>
<audio preload="auto" class="audio-tri" >
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-tri.mp3">
  <source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/audio-tri.ogg">
</audio>

<a class="twitter__link" target="_blank" href="https://twitter.com/intent/tweet?text=Check%20out%20this%20dinosaur%20memory%20game%20by%20@dazulu&via=CodePen%20&hashtags=codepen%2cdinosaurs%2cfrontend&url=https://codepen.io/dazulu/details/rQQpgY/">
  <img class="twitter__icon" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/twitter.svg" />
  Share
</a>
            
          
!

CSS

            
              // Mmm subset fonts!
@import url('https://fonts.googleapis.com/css?family=Fredoka+One&text=%3FYOUWON!');

body {
  align-items: center;
  background-image: radial-gradient(circle 448px at center, #16d9e3 0%, #30c7ec 47%, #46aef7 100%);
  display: flex;
  height: 100vh;
  justify-content: center;
  overflow: hidden;
  perspective: 1200px;
}

.board {
  display: grid;
  grid-gap: 20px;
  grid-template-columns: repeat(4, 100px);
  grid-template-rows: repeat(4, 100px);
  position: relative;
  top: 20px;
  transform-style: preserve-3d;
  transform: rotateX(50deg) rotateZ(22deg);
  user-select: none;
}

.clone {
  display: none;
}

.cube {
  animation: enter 600ms ease-out;
  transform-style: preserve-3d;
  transform: translateZ(0) scale(1);
  transition: all 350ms ease-out;
  transform-origin: 50% 50%;
  backface-visibility: hidden;
  
  &.flipped {
    pointer-events: none;
    transform: rotateY(180deg) translateZ(0) scale(1);
    transition: all 500ms ease-out;
  }
  
  &.matched {
    pointer-events: none;
    transform: rotateY(180deg) translateZ(0) scale(1);
    animation: match 650ms ease-out;
  }
}

.face {
  outline: 1px solid transparent;
  backface-visibility: hidden;
  box-shadow: inset 0 0 2px 1px #fff0d2;
  height: 100px;
  overflow: hidden;
  position: absolute;
  transform-origin: 50% 50%;
  width: 100px;
}

.face:nth-child(1) {
  background-color: wheat;
  cursor: pointer;
  transform: rotateY(0deg) translateZ(10px);
  transition: background 150ms ease-out;
    
  &:before {
    align-items: center;
    bottom: 0;
    color: #93794c;
    content: '?';
    display: flex;
    font-family: 'Fredoka One', cursive;
    font-size: 60px;
    justify-content: center;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
  }
}

.face:nth-child(2) {
  background-color: darken(wheat, 10%);
  width: 20px;
  transform: rotateY(90deg) translateZ(90px)
}
.face:nth-child(3) {
  background-color: dodgerblue;
  transform: rotateY(180deg) translateZ(10px)
}
.face:nth-child(4) {
  background-color: darken(wheat, 10%);
  width: 20px;
  transform: rotateY(270deg) translateZ(10px)
}
.face:nth-child(5) {
  background-color: darken(wheat, 10%);
  height: 20px;
  transform: rotateX(90deg) translateZ(10px)
}
.face:nth-child(6) {
  background-color: darken(wheat, 10%);
  height: 20px;
  transform: rotateX(-90deg) translateZ(90px)
}

.overlay {
  align-items: center;
  background: rgba(255,255,255,0.75);
  width: 100vw;
  display: flex;
  justify-content: center;
  left: 0;
  opacity: 1;
  position: absolute;
  height: 100vh;
  top: 0;
  transition: all 500ms ease-out;
  z-index: 100;
  
  &.hidden {
    opacity: 0;
    pointer-events: none;
    transition: all 300ms ease-out;
    
    .gameover {
      transform: translateY(60px);
      transition: all 300ms ease-out;
    }
  }
}

.gameover {
  align-items: center;
  background-color: #fff;
  border-radius: 120px;
  border: 12px solid #50b8f7;
  color: #2e2e2e;
  display: flex;
  font-family: 'Fredoka One', cursive;
  font-size: 40px;
  height: 120px;
  width: 340px;
  justify-content: space-between;
  padding: 0 10px 0 30px;
  transform: translateY(0);
  transition: all 500ms ease-out;
  user-select: none;
}

.reset {
  background-color: #fbc300;
  border-radius: 50%;
  border: 0;
  box-shadow: 0px 6px 0px 0px #f2a003;
  cursor: pointer;
  display: block;
  height: 94px;
  margin-left: 20px;
  position: relative;
  top: -3px;
  width: 96px;
  
  &:active {
    box-shadow: none;
    top: 0;
  }
  
  &:focus {
    outline: 0;
  }
}

.twitter__link {
  user-select: none;
  cursor: pointer;
  position: absolute;
  right: 10px;
  top: 12px;
  z-index: -1;
  background: #fff;
  border-radius: 20px;
  height: 30px;
  text-decoration: none;
  padding-right: 10px;
  justify-content: space-between;
  font-family: sans-serif;
  font-weight: 600;
  display: flex;
  align-items: center;
  color: #00aced;
  font-size: 14px;
  width: 74px;
  opacity: 0.4;
  z-index: 10;
  
  &:hover {
    opacity: 1;
  }
}

.twitter__icon {
  height: 30px;
}

[data-tile="egg"] { 
  div:nth-child(3) {
    background: #fff8e7 url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-egg.svg) center center no-repeat;
    background-size: 60px;
  }
}

[data-tile="dino"] { 
  div:nth-child(3) {
    background: #fff8e7 url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-dino1.svg) bottom center no-repeat;
    background-size: 85px;
  }
}

[data-tile="ahahah"] { 
  div:nth-child(3) {
    background: #fff8e7 url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-ah.svg) center center no-repeat;
    background-size: 60px;
  }
}

[data-tile="tri"] { 
  div:nth-child(3) {
    background: #fff8e7 url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-tri.svg) center center no-repeat;
    background-size: 85px;
  }
}

[data-tile="ptero"] { 
  div:nth-child(3) {
    background: #fff8e7 url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-ptero.svg) center center no-repeat;
    background-size: 85px;
  }
}

[data-tile="erupt"] { 
  div:nth-child(3) {
    background: #fff8e7 url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/62105/dino-erupt.svg) center center no-repeat;
    background-size: 85px;
  }
}

audio {
  display: none;
}


@keyframes enter {
  0% {
    transform: translateZ(-20px) scale(0.3);
  }
  50% {
    transform: translateZ(20px) scale(1.02);
  }
  100% {
    transform: translateZ(0) scale(1);
  }
}

@keyframes match {
  0% {
    transform: rotateY(180deg) translateZ(-15px);
  }
  50% {
    transform: rotateY(180deg) translateZ(10px);
  }
  100% {
    transform: rotateY(180deg) translateZ(0);
  }
}
            
          
!

JS

            
              const board = document.querySelector('.board');
const clone = document.querySelector('.clone');
const overlay = document.querySelector('.overlay');
const reset = document.querySelector('.reset');
const tileOptions = ['erupt', 'ptero', 'tri', 'ahahah', 'egg', 'dino'];

const state = {
  selections: [],
  boardLocked: false,
  matches: 0
};

reset.addEventListener('click', () => {
  if (state.boardLocked) return;
  resetGame();
});

function resetGame() {
  state.boardLocked = true;
  state.selections = [];
  state.matches = 0;

  document.querySelectorAll('.cube').forEach(tile => {
    tile.removeEventListener('click', () => selectTile(tile));
    tile.remove();
  });

  overlay.classList.add('hidden');
  createBoard();
}

function createBoard() {
  const tiles = shuffleArray([...tileOptions, ...tileOptions]);
  const length = tiles.length;

  for (let i = 0; i < length; i++) {
    window.setTimeout(() => {
      board.appendChild(buildTile(tiles.pop(), i));
    }, i * 100);
  }

  window.setTimeout(() => {
    document.querySelectorAll('.cube').forEach(tile => {
      tile.addEventListener('click', () => selectTile(tile));
    });

    state.boardLocked = false;
  }, tiles.length * 100);
}

function buildTile(option, id) {
  const tile = clone.cloneNode(true);
  tile.classList.remove('clone');
  tile.classList.add('cube');
  tile.setAttribute('data-tile', option);
  tile.setAttribute('data-id', id);
  return tile;
}

function selectTile(selectedTile) {
  if (state.boardLocked || selectedTile.classList.contains('flipped')) return;

  state.boardLocked = true;

  if (state.selections.length <= 1) {
    selectedTile.classList.add('flipped');
    state.selections.push({
      id: selectedTile.dataset.id,
      tile: selectedTile.dataset.tile,
      el: selectedTile
    });
  }

  /* =================================*
   *      Welcome to Timeout City     *
   *  Time since last incident: 300ms *
   * =================================*/
  if (state.selections.length === 2) {
    if (state.selections[0].tile === state.selections[1].tile) {
      window.setTimeout(() => {
        state.selections[0].el.classList.add('matched');
        state.selections[1].el.classList.add('matched');
        
        state.boardLocked = false;
        state.matches = state.matches + 1;
        
        if (state.matches === tileOptions.length) {
          window.setTimeout(() => {
            overlay.classList.remove('hidden');
            document.querySelector('.audio-win').play();
          }, 600);
        }
        state.selections = [];
        document.querySelector(`.audio-${selectedTile.dataset.tile}`).play();
      }, 600);
    } else {
      setTimeout(() => {
        document.querySelectorAll('.cube').forEach(tile => {
          tile.classList.remove('flipped');
        });
        state.boardLocked = false;
      }, 800);
      state.selections = [];
    }
  } else {
    state.boardLocked = false;
  }
}

// 🍝 Copy-Pasta - "ain't nobody got time for that"
function shuffleArray(array) {
  for (let i = array.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    [array[i], array[j]] = [array[j], array[i]];
  }
  return array;
}

createBoard();

            
          
!
999px

Console