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HTML

              
                .container#rects
  .row
      .col-md-1.col-md-offset-4#a1.cell
      .col-md-1#a2.cell
      .col-md-1#a3.cell
  .row
      .col-md-1.col-md-offset-4#b1.cell
      .col-md-1#b2.cell
      .col-md-1#b3.cell
  .row
      .col-md-1.col-md-offset-4#c1.cell
      .col-md-1#c2.cell
      .col-md-1#c3.cell
.container   
    .letter
      button.btn.btn-primary.btn-lg#start(data-toggle='modal', type='button', data-target='#myModal1') START    
    .modal.fade#myModal1(role='dialog')
      .modal-dialog
        .modal-content
          .modal-header
            button(type='button', class='close', data-dismiss='modal') &times;
            h3.modal-title Pick icon(X go first)
          .modal-body
            button.btn.btn-info#X(type='button', data-toggle='modal', data-target='#myModal2', data-dismiss='modal') X
            button.btn.btn-info#O(type='button', data-toggle='modal', data-target='#myModal2', data-dismiss='modal') O
          .modal-footer
            button.btn.btn-default(type='button', data-dismiss='modal') Close
     .modal.fade#myModal2(role='dialog')
      .modal-dialog
        .modal-content
          .modal-header
            button(type='button', class='close', data-dismiss='modal') &times;
            h3.modal-title Pick level
          .modal-body
            button.btn.btn-info.level#easy(onclick='', data-dismiss='modal') Easy
            button.btn.btn-info.level#hard(onclick='', data-dismiss='modal') Hard
          .modal-footer
            button.btn.btn-default(type='button', data-dismiss='modal') Close      
      
  .modal.fade#myModal3(role='dialog')
      .modal-dialog
        .modal-content
          .modal-header
            button(type='button', class='close', data-dismiss='modal') &times;
            h3.modal-title Result
          .modal-body
            p#showResult
          .modal-footer
            button.btn.btn-primary(type='button', data-dismiss='modal', onclick='reset()') Play again
            button.btn.btn-default(type='button', data-dismiss='modal') Close

              
            
!

CSS

              
                *
  margin: 0
  padding: 0
  box-sizing: border-box
//
  .container
    display: flex
    width: 502px
    height: 500px
    flex-wrap: wrap
    padding: 25px
    position: relative
  .cell
    width: 150px
    height: 150px
    font-size: 100px
    line-height: 150px
    text-align: center
    color: white
  #over
    margin-top: 100px
  #choice 
    margin-top: 10px
    position: relative
    margin-top: -300px
    margin-left: 100px
  .cell:nth-child(odd) 
    background: #4E5058
  .cell:nth-child(even)
    background: gray
  .btns
    width: 50px
    font-size: 50px
    border: 0
    background: #0087cc
    border-radius: 4px
    box-shadow: 0 5px 0 #006599
    color: #fff
    cursor: pointer
    outline: 0
    transition: all .1s linear
  .btns:active
    box-shadow: 0 2px 0 #006599
    transform: translateY(3px)
  span
    font-size: 20px
  #turn
    color: purple
    margin-top: -270px
    margin-left: 100px
    position: absolute
  #over
    margin-left: 1000px
    margin-top: -100px
  .btn-warning
#rects
  margin: auto
  padding-top: 50px
.row, .letter
  text-align: center
.cell
  width: 100px
  height: 100px
  border-width: 3px
  border-color: purple
  font-size: 50px
  color: black
#a1
  border-style: none dotted dotted none
#a2
  border-style: none dotted dotted none
#a3
  border-style: none none dotted none
#b1
  border-style: none dotted dotted none
#b2
  border-style: none dotted dotted none
#b3
  border-style: none none dotted none
#c1
  border-style: none dotted none none
#c2
  border-style: none dotted none none
              
            
!

JS

              
                var computer, player, cplayer;

        var cells = [
                      'a1', 'a2', 'a3',
                      'b1', 'b2', 'b3',
                      'c1', 'c2', 'c3'
                    ]
        $().ready(function(){});



          $('#X').click(function(){
              pickX();
              $('#start').addClass('hide');
          })

          function pickX(){
            player = 'X';
            computer = 'O';
            main();
          }

          $('#O').click(function(){
            pickO();
            $('#start').addClass('hide');
          })

          function pickO(){
            player = 'O';
            computer = 'X';
            main();
          }

          function main(){
            play();
          }

          function play(){
              if(player == 'O'){
                $('#b2').html(computer);
                 cells = cells.filter(function(val){
                  return val != 'b2';
                })
              }
              $('.cell').click(function main (e){
                var playerMove = e.target.id;
                cells = $.grep(cells, function(val){
                  return val != playerMove;
                });
                
                var computerMove = cells[Math.floor(Math.random() * cells.length)];
                cells = $.grep(cells, function(val){
                  return val != computerMove;
                });
              
                
                if($(this).html() == ''){
                  $(this).append(player);
                }else{
                  return;
                }
                checkWin(player);
                if($('#showResult').html()){
                  return;
                }
                
                $('#' + computerMove).append(computer);  

                
                checkWin(computer);
                if($('#showResult').html()){
                  return
                } 
                
                checkDraw();
              });
          }


          function checkWin(winner){
            var win = [
                                ['a1', 'a2', 'a3'],
                                ['b1', 'b2', 'b3'],
                                ['c1', 'c2', 'c3'],
                                ['a1', 'b1', 'c1'],
                                ['a2', 'b2', 'c2'],
                                ['a3', 'b3', 'c3'],
                                ['a1', 'b2', 'c3'],
                                ['a3', 'b2', 'c1']
                             ];

            for(var i = 0 ; i < win.length ; i++){
                  if($('#' + win[i][0]).text() === winner &&
                   $('#' + win[i][1]).text() === winner &&
                   $('#' + win[i][2]).text() === winner
                  ){
                      $('#showResult').html(winner + " win");
                      $('#myModal3').modal('show');
                  }
            }
          }

          function checkDraw(){
            var count = 0;
            $('.cell').each(function(){
              if($(this).html()){
                count++;
              }
            });

            if(count == 9 && !$('#showResult').html() ){
              $('#showResult').html('Draw');
              $('#myModal3').modal('show');
            }
          }

          function reset(){
            $('.cell').html('') ;
            cells = [
                  'a1', 'a2', 'a3',
                  'b1', 'b2', 'b3',
                  'c1', 'c2', 'c3'
                ]
            $('.cell').unbind('click') ;
            $('#myModal1').reset();
            $('#myModal1').modal('show');
            
          }
              
            
!
999px

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