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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.

            
              <div class="message">
  This pen is deprecated. Please check out the <a href="https://codepen.io/lonekorean/project/editor/ZGpqVX/" target="_blank">new project version here</a>.
</div>

<div class="wrapper">
  <div class="content">
    <div class="sidebar">
      <h1>Align 4</h1>
      <div class="panel dif">
        <h2>Difficulty</h2>
        <div class="dif-options">
          <div>
            <input id="dif1" type="radio" name="dif-options" value="1">
            <label for="dif1">1</label>
          </div>
          <div>
            <input id="dif2" type="radio" name="dif-options" value="2">
            <label for="dif2">2</label>
          </div>
          <div>
            <input id="dif3" type="radio" name="dif-options" value="3" checked>
            <label for="dif3">3</label>
          </div>
          <div>
            <input id="dif4" type="radio" name="dif-options" value="4">
            <label for="dif4">4</label>
          </div>
          <div>
            <input id="dif5" type="radio" name="dif-options" value="5">
            <label for="dif5">5</label>
          </div>
        </div>
        <div class="start">
          <button>Start Game</button>
        </div>
      </div>
      <div class="panel info">
        <h2></h2>
        <div class="blurb"></div>
        <div class="outlook"></div>
      </div>
    </div>
    <div class="board">
      <div class="lit-columns">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
      </div>
      <div class="lit-cells"></div>
      <div class="chips"></div>
      <div class="click-columns">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
      </div>
    </div>
  </div>
</div>
            
          
!
            
              @import url(https://fonts.googleapis.com/css?family=Doppio+One);

.message {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
  background-color: #fff;
  font-family: "Doppio One", sans-serif;
  font-size: 20px;
}

html {
  display: table;
  width: 100%;
  height: 100%;
}
body {
  display: table-row;
  background: #000 radial-gradient(1000px 500px, #3f546b, #000);
}
.wrapper {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
}
.content {
  display: inline-block;
  width: 668px;
  margin: 0 auto;
  padding: 50px 20px 10px;
}
.sidebar {
  float: left;
  margin-right: 20px;
  width: 220px;
  text-align: left;
  font-family: "Doppio One", sans-serif;
  color: #ccc;
}
h1, h2 {
  color: #fff;
  margin: 0;
  font-weight: normal;
}
h1 {
  height: 68px;
  line-height: 68px;
  font-size: 40px;
  text-align: right;
}
h2 {
  font-size: 18px;
}
.panel {
  padding: 12px;
  margin-bottom: 20px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}
.dif-options {
  clear: both;
  overflow: hidden;
  margin: 20px -7px 0;
}
.dif-options div {
  float: left;
  width: 20%;
}
.dif-options input {
  display: none;
}
.dif-options label {
  display: block;
  margin: 0 auto;
  width: 24px;
  height: 24px;
  background-color: #666;
  border: solid 2px #ccc;
  border-radius: 8px;
  color: #999;
  text-align: center;
  line-height: 24px;
  cursor: pointer;
}
.dif-options input:checked + label {
  color: #fff;
  background-color: #593f6b;
  border-color: #fff;
  cursor: default;
}
.freeze .dif-options input:not(:checked) + label {
  font-size: 0;
  margin: 7px auto;
  width: 10px;
  height: 10px;
  border-radius: 4px;
  color: transparent;
  line-height: 10px;
  cursor: default;
  transition: .2s;
}
.start {
  margin-top: 20px;
}
.freeze .start {
  display: none;
}
.start button {
  display: block;
  width: 100%;
  padding: 2px 12px 4px;
  font-family: "Doppio One", sans-serif;
  font-size: 24px;
  border: solid 2px #ccc;
  border-radius: 8px;
  background-color: #593f6b;
  color: #fff;
  cursor: pointer;
}
.start button:focus {
  outline: none;
}
.info div {
  margin-top: 10px;
}
.board {
  position: relative;
  float: left;
  width: 428px;
  height: 428px;
  margin-top: 68px;
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/77020/board.png);
  box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.4);
}
.lit-columns, .lit-cells, .chips, .click-columns {
  position: absolute;
  width: 428px;
  height: 428px;  
}
.lit-columns div {
  float: left;
  width: 60px;
  height: 426px;
  margin: 1px 0 1px 1px;
  transition: background-color 0.1s;
}
.lit-columns .lit {
  background-color: rgba(255, 255, 255, 0.1);
  transition: background-color 0.1s;
}
.lit-cells div {
  position: absolute;
  width: 60px;
  height: 60px;
  background-color: rgba(255, 255, 255, 0.3);
}
.chips div {
  position: absolute;
  width: 60px;
  height: 60px;
  backface-visibility: hidden;
}
.chips .p1 {
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/77020/p1-chip.png);
}
.chips .p2 {
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/77020/p2-chip.png);
}
.chips .cursor {
  bottom: 428px;
  transition: left 0.1s ease-out;
}
.chips .dropped {
  transition: bottom ease-in;
  animation: bounce 0.3s;
}
.click-columns div {
  float: left;
  width: 61px;
  height: 428px;
}
.click-columns div:first-child {
  padding-left: 1px;
}
.click-columns .hover {
  cursor: pointer;
}

@keyframes bounce {
  0% { animation-timing-function: ease-out; transform: translateY(0); }
  30% { animation-timing-function: ease-in; transform: translateY(-40px); }
  60% { animation-timing-function: ease-out; transform: translateY(0); }
  80% { animation-timing-function: ease-in; transform: translateY(-10px); }
  100% { animation-timing-function: ease-out; transform: translateY(0); }
}

            
          
!
            
              // constants
var WEB_WORKER_URL = 'https://s.codepen.io/lonekorean/pen/KnaJf.js';
var BLURBS = {
  'start': {
    header: 'Get Ready',
    blurb: 'Select your difficulty and start the game.'
  },
  'p1-turn': {
    header: 'Your Turn',
    blurb: 'Click on the board to drop your chip.'
  },
  'p2-turn': {
    header: 'Computer\'s Turn',
    blurb: 'The computer is trying to find the best way to make you lose.'
  },
  'p1-win': {
    header: 'You Win',
    blurb: 'You are a winner. Remember this moment. Carry it with you, forever.'
  },
  'p2-win': {
    header: 'Computer Wins',
    blurb: 'Try again when you\'re done wiping your tears of shame.'
  },
  'tie': {
    header: 'Tie',
    blurb: 'Everyone\'s a winner! Or loser. Depends on how you look at it.'
  }
};
var OUTLOOKS = {
  'win-imminent': 'Uh oh, computer is feeling saucy!',
  'loss-imminent': 'Computer is unsure. Now\'s your chance!'
};

// global variables
var worker;
var currentGameState;

// document ready
$(function() {
  $('.start button').on('click', startGame);
  setBlurb('start');
  setOutlook();
  
  // create worker
  worker = new Worker(WEB_WORKER_URL);
  worker.addEventListener('message', function(e) {
    switch(e.data.messageType) {
      case 'reset-done':
        startHumanTurn();
        break;
      case 'human-move-done':
        endHumanTurn(e.data.coords, e.data.isWin, e.data.winningChips, e.data.isBoardFull);
        break;
      case 'progress':
        updateComputerTurn(e.data.col);
        break;
      case 'computer-move-done':
        endComputerTurn(e.data.coords, e.data.isWin, e.data.winningChips, e.data.isBoardFull,
          e.data.isWinImminent, e.data.isLossImminent);
        break;
    }
  }, false);
});

function setBlurb(key) {
  $('.info h2').text(BLURBS[key].header);
  $('.info .blurb').text(BLURBS[key].blurb);
}

function setOutlook(key) {
  var $outlook = $('.info .outlook');
  if(key) {
    $outlook
      .text(OUTLOOKS[key])
      .show();
  } else {
    $outlook.hide();
  }
}

function startGame() {
  $('.dif').addClass('freeze');
  $('.dif input').prop('disabled', true);
  $('.lit-cells, .chips').empty();

  worker.postMessage({
    messageType: 'reset',
  });
}

function startHumanTurn() {
  setBlurb('p1-turn');
  $('.click-columns div').addClass('hover');
  
  // if mouse is already over a column, show cursor chip there
  var col = $('.click-columns div:hover').index();
  if(col !== -1) {
    createCursorChip(1, col);
  }
  
  $('.click-columns')
    .on('mouseenter', function() {
      var col = $('.click-columns div:hover').index();
      createCursorChip(1, col);
    })
    .on('mouseleave', function() {
      destroyCursorChip();
    });
  
  $('.click-columns div')
    .on('mouseenter', function() {
      var col = $(this).index();
      moveCursorChip(col);
    })
    .on('click', function() {
      $('.click-columns, .click-columns div').off();
      
      var col = $(this).index();
      worker.postMessage({
        messageType: 'human-move',
        col: col
      });
    });  
}

function endHumanTurn(coords, isWin, winningChips, isBoardFull) {
  $('.click-columns div').removeClass('hover');
  if(!coords) {
    // column was full, human goes again
    startHumanTurn();    
  } else {
    dropCursorChip(coords.row, function() {
      if(isWin) {
        endGame('p1-win', winningChips);
      } else if(isBoardFull) {
        endGame('tie');
      } else {
        // pass turn to computer
        startComputerTurn();
      }
    });
  }
}

function startComputerTurn() {
  setBlurb('p2-turn');
  
  // computer's cursor chip starts far left and moves right as it thinks
  createCursorChip(2, 0);
  
  var maxDepth = parseInt($('input[name=dif-options]:checked').val(), 10) + 1;
  worker.postMessage({
    messageType: 'computer-move',
    maxDepth: maxDepth
  });
}

function updateComputerTurn(col) {
  moveCursorChip(col);
}

function endComputerTurn(coords, isWin, winningChips, isBoardFull, isWinImminent, isLossImminent) {
  moveCursorChip(coords.col, function() {
    dropCursorChip(coords.row, function() {
      if (isWin) {
        endGame('p2-win', winningChips);
      } else if (isBoardFull) {
        endGame('tie');
      } else {
        if(isWinImminent) {
          setOutlook('win-imminent');
        } else if (isLossImminent) {
          setOutlook('loss-imminent');
        } else {
          setOutlook();
        }
        
        // pass turn to human
        startHumanTurn();
      }
    });
  });
}

function endGame(blurbKey, winningChips) {
  $('.dif').removeClass('freeze');
  $('.dif input').prop('disabled', false);
  setBlurb(blurbKey);
  setOutlook();
  
  if(winningChips) {
    // not a tie, highlight the chips in the winning run
    for(var i = 0; i < winningChips.length; i++) {
      createLitCell(winningChips[i].col, winningChips[i].row);
    }
  }
}

function createLitCell(col, row) {
  $('<div>')
  .css({
    'left': indexToPixels(col),
    'bottom': indexToPixels(row)
  })
  .appendTo('.lit-cells');
}

function createCursorChip(player, col) {
  var playerClass = 'p' + player;
  $('<div>', { 'class': 'cursor ' + playerClass })
    .css('left', indexToPixels(col))
    .appendTo('.chips');
  
  // also highlight column
  $('.lit-columns div').eq(col).addClass('lit');
}

function destroyCursorChip() {
  $('.chips .cursor').remove();
  $('.lit-columns .lit').removeClass('lit');
}

function moveCursorChip(col, callback) {
  $('.chips .cursor').css('left', indexToPixels(col));
  $('.lit-columns .lit').removeClass('lit');
  $('.lit-columns div').eq(col).addClass('lit');
  
  // callback is only used when the computer is about to drop a chip
  // give it a slight delay for visual interest
  setTimeout(callback, 300);
}

function dropCursorChip(row, callback) {
  // speed of animation depends on how far the chip has to drop
  var ms = (7 - row) * 40;
  var duration = (ms / 1000) + 's';
  
  $('.chips .cursor')
    .removeClass('cursor')
    .css({
      'bottom': indexToPixels(row),
      '-webkit-transition-duration': duration, 'transition-duration': duration,
      '-webkit-animation-delay': duration, 'animation-delay': duration
    })
    .addClass('dropped');
  
  $('.lit-columns .lit').removeClass('lit');
  setTimeout(callback, ms);
}

function indexToPixels(index) {
  return (index * 61 + 1) + 'px';
}
            
          
!
999px
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