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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

            
              .board__settings
  i.fa.fa-cog.board__settings-cog
  h1.board__header-settings Choose Player
    .board__row
      .board__settings__choice-cross
      .board__settings__choice-nought
.board__difficulty
  i.fa.fa-cog.board__settings-cog
  h1.board__header-difficulty Select Difficulty
  #easy.board__difficulty__button-easy Easy
  #medium.board__difficulty__button-medium Medium
  #hard.board__difficulty__button-hard Hard
.board
  - for (var j = 0; j < 9; j++)
    if (j == 0 || j % 3 == 0)
      .board__row
        - for (var i = j; i < (3 + j); i++)
          - if (i >= 9) break;
            input(type='radio').board__slot-hidden
            label(id=i).board__slot
            
          
!

CSS

            
              @import "bourbon";

@import url(https://fonts.googleapis.com/css?family=PT+Sans:400,700,300);


$size-sm: 60px;
$size: 110px;
$spacing: 5px;
$thickness: 2px;
$padding: 70px;
$radius: 30px;

$player-color: rgb(255, 255, 255);
$computer-color: rgba(255, 255, 255, .5);
$border-color: #5E5955;
$default-color: #55504C;

$cross-icon:  "\f00d";
$nought-icon:  "\f10c";

body {
  font-family: Arial;
  @include linear-gradient(50deg, #BB4A9F 0%, #E4E5D7 35%, #BEE8D7 65%, #51C8C8 90%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.board-default {
  width: ($size-sm * 3 + $padding);
  height: ($size-sm * 3 + $padding);
  display: flex;
  justify-content: center;
  align-content: center;
  flex-direction: column;
  text-align: center;

  border-radius: $radius;
  background-color: rgba(255, 255, 255, .4);

  &:before {
    content: '';
    position: absolute;
    z-index: -1;
    top: -15px;
    left: -15px;
    right: -15px;
    bottom: -15px;
    border-radius: $radius+21;
    border: 15px solid rgba(0, 0, 0, .05);
  }
  @media(min-width: 450px) {
    width: ($size * 3 + $padding);
    height: ($size * 3 + $padding);
  }
}

.board {
  @extend .board-default;
  position: relative;
  margin: 40px auto;
}

.board__wrapper {
  display: inline-flex;
}
.board__row {
  display: block;
}

// Radio input
.board__slot-hidden {
  display: none;
}

// Radio label
.board__slot {
  display: inline-block;
  height: $size-sm;
  width: $size-sm;
  box-sizing: border-box;
  position: relative;
  cursor: pointer;
  border-radius: 15px;
  background-color: rgba(0, 0, 0, .15);
  margin: 5px;
  @media(min-width: 450px) {
    height: $size;
    width: $size;
    border-radius: $radius;
  }

  &:hover {
    background-color: rgba(0, 0, 0, 0.1);
  }

  &:active {
    border: 2px solid rgba(0, 0, 0, .09);
  }
}

// Settings menu
.board__settings {
  @extend .board-default;
  position: absolute;
  margin: auto;
  right: 0;
  left: 0;
  z-index: 3;
  text-align: center;
  visibility: hidden;
  background-color: rgba(223, 244, 239, 1);
}


.board__settings-cog {

  position: absolute;
  top: -15px;
  left: -15px;
  width: 30px;
  font-size: 2em;
  background-color: rgb(224, 244, 239);
  border-radius: 50%;
  border: 10px solid rgb(224, 244, 239);
  cursor: pointer;
  z-index: 9;
  color: rgba(0, 0, 0, .5);

  &:hover {
    box-shadow: 1px 1px 2px 5px rgba(0, 0, 0, .05);
  }

  &:after {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border-radius: $radius+21;
    border: 3px solid rgba(0, 0, 0, .2);
  }
}

.board__settings__choice {
  display: inline-block;
  height: $size-sm;
  width: $size-sm;
  box-sizing: border-box;
  position: relative;
  cursor: pointer;
  border-radius: 15px;
  background-color: rgba(0, 0, 0, .15);
  margin: 5px;
  z-index: 99;
  padding-top: 8px;

  @media(min-width: 450px) {
    height: $size;
    width: $size;
    border-radius: $radius;
  }
  @at-root #{&}-cross {
    @extend .board__settings__choice;
    font-size: .7em;
  }
  @at-root #{&}-nought {
    @extend .board__settings__choice;
    font-size: .2em;
  }

  &:hover {
    background-color: rgba(0, 0, 0, 0.1);
  }

  &:active {
    border: 2px solid rgba(0, 0, 0, .09);
  }
}

.board__settings__choice-cross {
  font-family: 'FontAwesome';
  font-size: 2.3em;
  cursor: pointer;
  @media(min-width: 450px) {
    font-size: 3em;
    top: 15px;
  }
  &:before {
    color: $player-color;
    content: $cross-icon;
  }
}

.board__settings__choice-nought {
  font-family: 'FontAwesome';
  font-size: 2.3em;
  cursor: pointer;
  @media(min-width: 450px) {
    font-size: 2.8em;
    top: 10px;
  }
  &:before {
    color: $player-color;
    content: $nought-icon;
  }
}

// Difficulty menu
.board__difficulty {
  @extend .board-default;
  position: absolute;
  margin: auto;
  right: 0;
  left: 0;
  z-index: 2;
  text-align: center;
  background-color: rgba(223, 244, 239, .8);
}

.board__header {
  font-family: 'PT Sans', Arial, sans-serif;
  color: rgba(0, 0, 0, .7);
  font-size: 1.5em;
  position: absolute;
  top: 20px;
  left: 0;
  right: 0;
  text-transform: uppercase;
  @media(min-width: 450px) {
    font-size: 2em;
  }
  @at-root #{&}-settings {
    @extend .board__header;
  }
  @at-root #{&}-difficulty {
    @extend .board__header;
  }
}

.board__difficulty__button {
  position: relative;
  display: block;
  margin: 10px auto;
  padding: 5px;
  font-family: 'PT Sans', arial, sans-serif;
  font-size: 1em;
  width: 150px;
  background-color: #fff;
  border: 1px solid #ccc;
  color: #000;
  text-transform: uppercase;

  &:before, &:after {
    content: '';
    position: absolute;
    z-index: -2;
    transition: all 250ms ease-out;
    bottom: 15px;
    width: 50%;
    height: 20%;
    box-shadow: 0 10px 30px rgba(31, 31, 31, 0.5);
  }
  &:before {
    left: 8px;
    transform: rotate(-3deg);
  }
  &:after {
    right: 8px;
    transform: rotate(3deg);
  }
  &:hover {
    border-color: transparent;
    cursor: pointer;
    &:before, &:after {
      box-shadow: 0 15px 12px rgba(31, 31, 31, 0.7);
    }
  }

  @at-root #{&}-easy {
    @extend .board__difficulty__button;
    margin-top: 70px;
  }
  @at-root #{&}-medium {
    @extend .board__difficulty__button;
  }
  @at-root #{&}-hard {
    @extend .board__difficulty__button;
  }

  @media(min-width: 450px) {
    padding: 10px 40px;
    font-size: 2em;
    width: 200px;
  }
}

// nought icons
.nought:before, .cross:before {
  font-family: 'FontAwesome';
  font-size: 3em;
  position: absolute;
  top: 5px;
  bottom: 0;
  left: 0px;
  right: 0px;
  cursor: default;
  @media(min-width: 450px) {
    font-size: 5em;
    top: 15px;
  }
}
.nought:before {
  content: $nought-icon;
}
.cross:before {
  content: $cross-icon;
}

.computer-color {
  color: $computer-color;
}

.player-color {
  color: $player-color;
}

/* Animations */
.slideUp {
  animation: slideUp 1s ease-in-out;
  animation-fill-mode: forwards;
}
.slideDown {
  animation: slideDown 1s ease-in-out;
  animation-fill-mode: forwards;
}
@keyframes slideUp {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-500px);
  }
}
@keyframes slideDown {
  0% {
    transform: translateY(-500px);
  }
  100% {
    transform: translateY(0);
  }
}

            
          
!

JS

            
              /* Globals */
var NUM_ROWS = 3,
  	NUM_COLS = 3,
  	NUM_SQUARES = NUM_ROWS * NUM_COLS,
  	GAMEBOARD = new Array(NUM_SQUARES),
    WIN_COMBOS = [[0,1,2],[3,4,5],[6,7,8],[0,3,6],
                  [1,4,7],[2,5,8],[0,4,8],[2,4,6]],
  	MAX_DEPTH,
  	AI_MOVE,
    PLAYER_CLASS = 'cross',
    COMPUTER_CLASS = 'nought',
    RUNNING = false;

$(document).ready(function() {
	/* Start a new game */
	new_game();

  /* Settings cog clicked, show the settings menu */
  $(".board__settings-cog").click(function() {
    if ($(".board__settings").css('visibility') == 'hidden') {
      $(".board__settings").css('visibility', 'visible');
    } else {
      $(".board__settings").css('visibility', 'hidden');
    }
  });

  /* Player class has been switched from the settings menu */
  $(".board__settings__choice-cross").click(function() {
    PLAYER_CLASS = 'cross';
    COMPUTER_CLASS = 'nought';
    $(".board__settings").css('visibility', 'hidden');
    console.log('set class to cross');
  });

  $(".board__settings__choice-nought").click(function() {
    PLAYER_CLASS = 'nought';
    COMPUTER_CLASS = 'cross';
    $(".board__settings").css('visibility', 'hidden');
  });

  /* Difficulty selected */
  $("div[class*=board__difficulty__button]").click(function() {
    var difficulty = $(this).attr("id");

    if (difficulty === 'easy') MAX_DEPTH = 1;
    else if (difficulty === 'medium') MAX_DEPTH = 3;
    else MAX_DEPTH = 6;

    $(".board__difficulty").removeClass('slideDown').addClass('slideUp');
    new_game();

  });

	/* Process a square being clicked */
  $(".board__slot").click(function() {
    if (RUNNING) {
  		var pos = Number($(this).attr("id"));

  		/* If the square is empty, process the click */
  		if (GAMEBOARD[pos] == "") {
  			$(this).addClass(PLAYER_CLASS + ' player-color');
  			GAMEBOARD[pos] = "X";

  			if (full(GAMEBOARD)) {
          RUNNING = false;
  				$(".board__header-difficulty").html("It's a tie!");
          $(".board__difficulty").removeClass('slideUp').addClass('slideDown');
  			} else if (wins(GAMEBOARD, "X")) {
          RUNNING = false;
  				$(".board__header-difficulty").html("You win!");
          $(".board__difficulty").removeClass('slideUp').addClass('slideDown');
  			} else {
  				minimax(GAMEBOARD, "O", 0);
  				GAMEBOARD[AI_MOVE] = "O";
  				$(".board__slot[id=" + AI_MOVE + "]").addClass(COMPUTER_CLASS + ' computer-color');

  				if (wins(GAMEBOARD, "O")) {
            RUNNING = false;
  					$(".board__header-difficulty").html("You lost!");
            $(".board__difficulty").removeClass('slideUp').addClass('slideDown');
  				}
  			}
  		}
    }
	});
});

/* Starts a new game */
function new_game() {
	/* Clear the table */
	$(".board__slot").each(function() {
		$(this).removeClass(PLAYER_CLASS + ' player-color computer-color ' + COMPUTER_CLASS);
	});

	/* Clear the gameboard */
	for (var i = 0; i < NUM_SQUARES; i++) {
		GAMEBOARD[i] = "";
	}

  RUNNING = true;
}

/* For a given state of the board, returns all the available moves */
function get_available_moves(state) {
	var all_moves = Array.apply(null, {length: NUM_SQUARES}).map(Number.call, Number);
	return all_moves.filter(function(i) { return state[i] == ""; });
}

/* Given a state of the board, returns true if the board is full */
function full(state) {
	return !get_available_moves(state).length;
}

/* Given a state of the board, returns true if the specified player has won */
function wins(state, player) {
	var win;

	for (var i = 0; i < WIN_COMBOS.length; i++) {
		win = true;
		for (var j = 0; j < WIN_COMBOS[i].length; j++) {
			if (state[WIN_COMBOS[i][j]] != player) {
				win = false;
			}
		}
		if (win) {
			return true;
		}
	}
	return false;
}

/* Given a state of the board, returns true if the board is full or a player has won */
function terminal(state) {
	return full(state) || wins(state, "X") || wins(state, "O");
}

/* Returns the value of a state of the board */
function score(state) {
	if (wins(state, "X")) {
		return 10;
	} else if (wins(state, "O")) {
		return -10;
	} else {
		return 0;
	}
}

/* Finds the optimal decision for the AI */
function minimax(state, player, depth) {
	if (depth >= MAX_DEPTH || terminal(state)) {
		return score(state);
	}

	var max_score,
		min_score,
		scores = [],
		moves = [],
		opponent = (player == "X") ? "O" : "X",
		successors = get_available_moves(state);

	for (var s in successors) {
		var possible_state = state;
		possible_state[successors[s]] = player;
		scores.push(minimax(possible_state, opponent, depth + 1));
		possible_state[successors[s]] = "";
		moves.push(successors[s]);
	}

	if (player == "X") {
		AI_MOVE = moves[0];
		max_score = scores[0];
		for (var s in scores) {
			if (scores[s] > max_score) {
				max_score = scores[s];
				AI_MOVE = moves[s];
			}
		}
		return max_score;
	} else {
		AI_MOVE = moves[0];
		min_score = scores[0];
		for (var s in scores) {
			if (scores[s] < min_score) {
				min_score = scores[s];
				AI_MOVE = moves[s];
			}
		}
		return min_score;
	}
}

            
          
!
999px

Console