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HTML

              
                <div class="block"></div>

<div class="block"></div>

<div class="block"></div>

<div class="block"></div>
              
            
!

CSS

              
                @import "compass/css3";

body {padding: 50px; background: #44bdf9; position: relative;}

@mixin keyframes($name) {
  @-webkit-keyframes #{$name} { @content; }
     @-moz-keyframes #{$name} { @content; }
          @keyframes #{$name} { @content; }
}

$lightbrown: #c64d1d;
 $darkbrown: #790907;
    $yellow: #fa9844;
     $black: #000000;

@mixin frame1 {
  box-shadow:
   1px 0px 0px $lightbrown,
   2px 0px 0px $lightbrown,
   3px 0px 0px $lightbrown,
   4px 0px 0px $lightbrown,
   5px 0px 0px $lightbrown,
   6px 0px 0px $lightbrown,
   7px 0px 0px $lightbrown,
   8px 0px 0px $lightbrown,
   9px 0px 0px $lightbrown,
  10px 0px 0px $lightbrown,
  11px 0px 0px $lightbrown,
  12px 0px 0px $lightbrown,
  13px 0px 0px $lightbrown,
  14px 0px 0px $lightbrown,
  
   0px 1px 0px $lightbrown,
   1px 1px 0px $yellow,
   2px 1px 0px $yellow,
   3px 1px 0px $yellow,
   4px 1px 0px $yellow,
   5px 1px 0px $yellow,
   6px 1px 0px $yellow,
   7px 1px 0px $yellow,
   8px 1px 0px $yellow,
   9px 1px 0px $yellow,
  10px 1px 0px $yellow,
  11px 1px 0px $yellow,
  12px 1px 0px $yellow,
  13px 1px 0px $yellow,
  14px 1px 0px $yellow,
  15px 1px 0px $black,
  
   0px 2px 0px $lightbrown,
   1px 2px 0px $yellow,
   2px 2px 0px $black,
   3px 2px 0px $yellow,
   4px 2px 0px $yellow,
   5px 2px 0px $yellow,
   6px 2px 0px $yellow,
   7px 2px 0px $yellow,
   8px 2px 0px $yellow,
   9px 2px 0px $yellow,
  10px 2px 0px $yellow,
  11px 2px 0px $yellow,
  12px 2px 0px $yellow,
  13px 2px 0px $black,
  14px 2px 0px $yellow,
  15px 2px 0px $black,
  
   0px 3px 0px $lightbrown,
   1px 3px 0px $yellow,
   2px 3px 0px $yellow,
   3px 3px 0px $yellow,
   4px 3px 0px $yellow,
   5px 3px 0px $lightbrown,
   6px 3px 0px $lightbrown,
   7px 3px 0px $lightbrown,
   8px 3px 0px $lightbrown,
   9px 3px 0px $lightbrown,
  10px 3px 0px $yellow,
  11px 3px 0px $yellow,
  12px 3px 0px $yellow,
  13px 3px 0px $yellow,
  14px 3px 0px $yellow,
  15px 3px 0px $black,
  
   0px 4px 0px $lightbrown,
   1px 4px 0px $yellow,
   2px 4px 0px $yellow,
   3px 4px 0px $yellow,
   4px 4px 0px $lightbrown,
   5px 4px 0px $lightbrown,
   6px 4px 0px $black,
   7px 4px 0px $black,
   8px 4px 0px $black,
   9px 4px 0px $lightbrown,
  10px 4px 0px $lightbrown,
  11px 4px 0px $yellow,
  12px 4px 0px $yellow,
  13px 4px 0px $yellow,
  14px 4px 0px $yellow,
  15px 4px 0px $black,
  
   0px 5px 0px $lightbrown,
   1px 5px 0px $yellow,
   2px 5px 0px $yellow,
   3px 5px 0px $yellow,
   4px 5px 0px $lightbrown,
   5px 5px 0px $lightbrown,
   6px 5px 0px $black,
   7px 5px 0px $yellow,
   8px 5px 0px $yellow,
   9px 5px 0px $lightbrown,
  10px 5px 0px $lightbrown,
  11px 5px 0px $black,
  12px 5px 0px $yellow,
  13px 5px 0px $yellow,
  14px 5px 0px $yellow,
  15px 5px 0px $black,
  
   0px 6px 0px $lightbrown,
   1px 6px 0px $yellow,
   2px 6px 0px $yellow,
   3px 6px 0px $yellow,
   4px 6px 0px $lightbrown,
   5px 6px 0px $lightbrown,
   6px 6px 0px $black,
   7px 6px 0px $yellow,
   8px 6px 0px $yellow,
   9px 6px 0px $lightbrown,
  10px 6px 0px $lightbrown,
  11px 6px 0px $black,
  12px 6px 0px $yellow,
  13px 6px 0px $yellow,
  14px 6px 0px $yellow,
  15px 6px 0px $black,
  
   0px 7px 0px $lightbrown,
   1px 7px 0px $yellow,
   2px 7px 0px $yellow,
   3px 7px 0px $yellow,
   4px 7px 0px $yellow,
   5px 7px 0px $black,
   6px 7px 0px $black,
   7px 7px 0px $yellow,
   8px 7px 0px $lightbrown,
   9px 7px 0px $lightbrown,
  10px 7px 0px $lightbrown,
  11px 7px 0px $black,
  12px 7px 0px $yellow,
  13px 7px 0px $yellow,
  14px 7px 0px $yellow,
  15px 7px 0px $black,
  
   0px 8px 0px $lightbrown,
   1px 8px 0px $yellow,
   2px 8px 0px $yellow,
   3px 8px 0px $yellow,
   4px 8px 0px $yellow,
   5px 8px 0px $yellow,
   6px 8px 0px $yellow,
   7px 8px 0px $lightbrown,
   8px 8px 0px $lightbrown,
   9px 8px 0px $black,
  10px 8px 0px $black,
  11px 8px 0px $black,
  12px 8px 0px $yellow,
  13px 8px 0px $yellow,
  14px 8px 0px $yellow,
  15px 8px 0px $black,
  
   0px 9px 0px $lightbrown,
   1px 9px 0px $yellow,
   2px 9px 0px $yellow,
   3px 9px 0px $yellow,
   4px 9px 0px $yellow,
   5px 9px 0px $yellow,
   6px 9px 0px $yellow,
   7px 9px 0px $lightbrown,
   8px 9px 0px $lightbrown,
   9px 9px 0px $black,
  10px 9px 0px $yellow,
  11px 9px 0px $yellow,
  12px 9px 0px $yellow,
  13px 9px 0px $yellow,
  14px 9px 0px $yellow,
  15px 9px 0px $black,

   0px 10px 0px $lightbrown,
   1px 10px 0px $yellow,
   2px 10px 0px $yellow,
   3px 10px 0px $yellow,
   4px 10px 0px $yellow,
   5px 10px 0px $yellow,
   6px 10px 0px $yellow,
   7px 10px 0px $yellow,
   8px 10px 0px $black,
   9px 10px 0px $black,
  10px 10px 0px $yellow,
  11px 10px 0px $yellow,
  12px 10px 0px $yellow,
  13px 10px 0px $yellow,
  14px 10px 0px $yellow,
  15px 10px 0px $black,
  
   0px 11px 0px $lightbrown,
   1px 11px 0px $yellow,
   2px 11px 0px $yellow,
   3px 11px 0px $yellow,
   4px 11px 0px $yellow,
   5px 11px 0px $yellow,
   6px 11px 0px $yellow,
   7px 11px 0px $lightbrown,
   8px 11px 0px $lightbrown,
   9px 11px 0px $yellow,
  10px 11px 0px $yellow,
  11px 11px 0px $yellow,
  12px 11px 0px $yellow,
  13px 11px 0px $yellow,
  14px 11px 0px $yellow,
  15px 11px 0px $black,
  
   0px 12px 0px $lightbrown,
   1px 12px 0px $yellow,
   2px 12px 0px $yellow,
   3px 12px 0px $yellow,
   4px 12px 0px $yellow,
   5px 12px 0px $yellow,
   6px 12px 0px $yellow,
   7px 12px 0px $lightbrown,
   8px 12px 0px $lightbrown,
   9px 12px 0px $black,
  10px 12px 0px $yellow,
  11px 12px 0px $yellow,
  12px 12px 0px $yellow,
  13px 12px 0px $yellow,
  14px 12px 0px $yellow,
  15px 12px 0px $black,
  
   0px 13px 0px $lightbrown,
   1px 13px 0px $yellow,
   2px 13px 0px $black,
   3px 13px 0px $yellow,
   4px 13px 0px $yellow,
   5px 13px 0px $yellow,
   6px 13px 0px $yellow,
   7px 13px 0px $yellow,
   8px 13px 0px $black,
   9px 13px 0px $black,
  10px 13px 0px $yellow,
  11px 13px 0px $yellow,
  12px 13px 0px $yellow,
  13px 13px 0px $black,
  14px 13px 0px $yellow,
  15px 13px 0px $black,
  
   0px 14px 0px $lightbrown,
   1px 14px 0px $yellow,
   2px 14px 0px $yellow,
   3px 14px 0px $yellow,
   4px 14px 0px $yellow,
   5px 14px 0px $yellow,
   6px 14px 0px $yellow,
   7px 14px 0px $yellow,
   8px 14px 0px $yellow,
   9px 14px 0px $yellow,
  10px 14px 0px $yellow,
  11px 14px 0px $yellow,
  12px 14px 0px $yellow,
  13px 14px 0px $yellow,
  14px 14px 0px $yellow,
  15px 14px 0px $black,
  
   0px 15px 0px $black,
   1px 15px 0px $black,
   2px 15px 0px $black,
   3px 15px 0px $black,
   4px 15px 0px $black,
   5px 15px 0px $black,
   6px 15px 0px $black,
   7px 15px 0px $black,
   8px 15px 0px $black,
   9px 15px 0px $black,
  10px 15px 0px $black,
  11px 15px 0px $black,
  12px 15px 0px $black,
  13px 15px 0px $black,
  14px 15px 0px $black,
  15px 15px 0px $black;
}

@mixin frame2 {
box-shadow:
    1px 0px 0px $lightbrown,
    2px 0px 0px $lightbrown,
    3px 0px 0px $lightbrown,
    4px 0px 0px $lightbrown,
    5px 0px 0px $lightbrown,
    6px 0px 0px $lightbrown,
    7px 0px 0px $lightbrown,
    8px 0px 0px $lightbrown,
    9px 0px 0px $lightbrown,
   10px 0px 0px $lightbrown,
   11px 0px 0px $lightbrown,
   12px 0px 0px $lightbrown,
   13px 0px 0px $lightbrown,
   14px 0px 0px $lightbrown,
   
    0px 1px 0px $lightbrown,
    1px 1px 0px $lightbrown,
    2px 1px 0px $lightbrown,
    3px 1px 0px $lightbrown,
    4px 1px 0px $lightbrown,
    5px 1px 0px $lightbrown,
    6px 1px 0px $lightbrown,
    7px 1px 0px $lightbrown,
    8px 1px 0px $lightbrown,
    9px 1px 0px $lightbrown,
   10px 1px 0px $lightbrown,
   11px 1px 0px $lightbrown,
   12px 1px 0px $lightbrown,
   13px 1px 0px $lightbrown,
   14px 1px 0px $lightbrown,
   15px 1px 0px $black,
   
    0px 2px 0px $lightbrown,
    1px 2px 0px $lightbrown,
    2px 2px 0px $black,
    3px 2px 0px $lightbrown,
    4px 2px 0px $lightbrown,
    5px 2px 0px $lightbrown,
    6px 2px 0px $lightbrown,
    7px 2px 0px $lightbrown,
    8px 2px 0px $lightbrown,
    9px 2px 0px $lightbrown,
   10px 2px 0px $lightbrown,
   11px 2px 0px $lightbrown,
   12px 2px 0px $lightbrown,
   13px 2px 0px $black,
   14px 2px 0px $lightbrown,
   15px 2px 0px $black,
   
    0px 3px 0px $lightbrown,
    1px 3px 0px $lightbrown,
    2px 3px 0px $lightbrown,
    3px 3px 0px $lightbrown,
    4px 3px 0px $lightbrown,
    5px 3px 0px $lightbrown,
    6px 3px 0px $lightbrown,
    7px 3px 0px $lightbrown,
    8px 3px 0px $lightbrown,
    9px 3px 0px $lightbrown,
   10px 3px 0px $lightbrown,
   11px 3px 0px $lightbrown,
   12px 3px 0px $lightbrown,
   13px 3px 0px $lightbrown,
   14px 3px 0px $lightbrown,
   15px 3px 0px $black,
   
    0px 4px 0px $lightbrown,
    1px 4px 0px $lightbrown,
    2px 4px 0px $lightbrown,
    3px 4px 0px $lightbrown,
    4px 4px 0px $lightbrown,
    5px 4px 0px $lightbrown,
    6px 4px 0px $black,
    7px 4px 0px $black,
    8px 4px 0px $black,
    9px 4px 0px $lightbrown,
   10px 4px 0px $lightbrown,
   11px 4px 0px $lightbrown,
   12px 4px 0px $lightbrown,
   13px 4px 0px $lightbrown,
   14px 4px 0px $lightbrown,
   15px 4px 0px $black,
   
    0px 5px 0px $lightbrown,
    1px 5px 0px $lightbrown,
    2px 5px 0px $lightbrown,
    3px 5px 0px $lightbrown,
    4px 5px 0px $lightbrown,
    5px 5px 0px $lightbrown,
    6px 5px 0px $black,
    7px 5px 0px $lightbrown,
    8px 5px 0px $lightbrown,
    9px 5px 0px $lightbrown,
   10px 5px 0px $lightbrown,
   11px 5px 0px $black,
   12px 5px 0px $lightbrown,
   13px 5px 0px $lightbrown,
   14px 5px 0px $lightbrown,
   15px 5px 0px $black,
   
    0px 6px 0px $lightbrown,
    1px 6px 0px $lightbrown,
    2px 6px 0px $lightbrown,
    3px 6px 0px $lightbrown,
    4px 6px 0px $lightbrown,
    5px 6px 0px $lightbrown,
    6px 6px 0px $black,
    7px 6px 0px $lightbrown,
    8px 6px 0px $lightbrown,
    9px 6px 0px $lightbrown,
   10px 6px 0px $lightbrown,
   11px 6px 0px $black,
   12px 6px 0px $lightbrown,
   13px 6px 0px $lightbrown,
   14px 6px 0px $lightbrown,
   15px 6px 0px $black,
   
    0px 7px 0px $lightbrown,
    1px 7px 0px $lightbrown,
    2px 7px 0px $lightbrown,
    3px 7px 0px $lightbrown,
    4px 7px 0px $lightbrown,
    5px 7px 0px $black,
    6px 7px 0px $black,
    7px 7px 0px $lightbrown,
    8px 7px 0px $lightbrown,
    9px 7px 0px $lightbrown,
   10px 7px 0px $lightbrown,
   11px 7px 0px $black,
   12px 7px 0px $lightbrown,
   13px 7px 0px $lightbrown,
   14px 7px 0px $lightbrown,
   15px 7px 0px $black,
   
    0px 8px 0px $lightbrown,
    1px 8px 0px $lightbrown,
    2px 8px 0px $lightbrown,
    3px 8px 0px $lightbrown,
    4px 8px 0px $lightbrown,
    5px 8px 0px $lightbrown,
    6px 8px 0px $lightbrown,
    7px 8px 0px $lightbrown,
    8px 8px 0px $lightbrown,
    9px 8px 0px $black,
   10px 8px 0px $black,
   11px 8px 0px $black,
   12px 8px 0px $lightbrown,
   13px 8px 0px $lightbrown,
   14px 8px 0px $lightbrown,
   15px 8px 0px $black,
   
    0px 9px 0px $lightbrown,
    1px 9px 0px $lightbrown,
    2px 9px 0px $lightbrown,
    3px 9px 0px $lightbrown,
    4px 9px 0px $lightbrown,
    5px 9px 0px $lightbrown,
    6px 9px 0px $lightbrown,
    7px 9px 0px $lightbrown,
    8px 9px 0px $lightbrown,
    9px 9px 0px $black,
   10px 9px 0px $lightbrown,
   11px 9px 0px $lightbrown,
   12px 9px 0px $lightbrown,
   13px 9px 0px $lightbrown,
   14px 9px 0px $lightbrown,
   15px 9px 0px $black,
   
   0px 10px 0px $lightbrown,
   1px 10px 0px $lightbrown,
   2px 10px 0px $lightbrown,
   3px 10px 0px $lightbrown,
   4px 10px 0px $lightbrown,
   5px 10px 0px $lightbrown,
   6px 10px 0px $lightbrown,
   7px 10px 0px $lightbrown,
   8px 10px 0px $black,
   9px 10px 0px $black,
  10px 10px 0px $lightbrown,
  11px 10px 0px $lightbrown,
  12px 10px 0px $lightbrown,
  13px 10px 0px $lightbrown,
  14px 10px 0px $lightbrown,
  15px 10px 0px $black,
  
   0px 11px 0px $lightbrown,
   1px 11px 0px $lightbrown,
   2px 11px 0px $lightbrown,
   3px 11px 0px $lightbrown,
   4px 11px 0px $lightbrown,
   5px 11px 0px $lightbrown,
   6px 11px 0px $lightbrown,
   7px 11px 0px $lightbrown,
   8px 11px 0px $lightbrown,
   9px 11px 0px $lightbrown,
  10px 11px 0px $lightbrown,
  11px 11px 0px $lightbrown,
  12px 11px 0px $lightbrown,
  13px 11px 0px $lightbrown,
  14px 11px 0px $lightbrown,
  15px 11px 0px $black,
  
   0px 12px 0px $lightbrown,
   1px 12px 0px $lightbrown,
   2px 12px 0px $lightbrown,
   3px 12px 0px $lightbrown,
   4px 12px 0px $lightbrown,
   5px 12px 0px $lightbrown,
   6px 12px 0px $lightbrown,
   7px 12px 0px $lightbrown,
   8px 12px 0px $lightbrown,
   9px 12px 0px $black,
  10px 12px 0px $lightbrown,
  11px 12px 0px $lightbrown,
  12px 12px 0px $lightbrown,
  13px 12px 0px $lightbrown,
  14px 12px 0px $lightbrown,
  15px 12px 0px $black,
  
   0px 13px 0px $lightbrown,
   1px 13px 0px $lightbrown,
   2px 13px 0px $black,
   3px 13px 0px $lightbrown,
   4px 13px 0px $lightbrown,
   5px 13px 0px $lightbrown,
   6px 13px 0px $lightbrown,
   7px 13px 0px $lightbrown,
   8px 13px 0px $black,
   9px 13px 0px $black,
  10px 13px 0px $lightbrown,
  11px 13px 0px $lightbrown,
  12px 13px 0px $lightbrown,
  13px 13px 0px $black,
  14px 13px 0px $lightbrown,
  15px 13px 0px $black,
  
   0px 14px 0px $lightbrown,
   1px 14px 0px $lightbrown,
   2px 14px 0px $lightbrown,
   3px 14px 0px $lightbrown,
   4px 14px 0px $lightbrown,
   5px 14px 0px $lightbrown,
   6px 14px 0px $lightbrown,
   7px 14px 0px $lightbrown,
   8px 14px 0px $lightbrown,
   9px 14px 0px $lightbrown,
  10px 14px 0px $lightbrown,
  11px 14px 0px $lightbrown,
  12px 14px 0px $lightbrown,
  13px 14px 0px $lightbrown,
  14px 14px 0px $lightbrown,
  15px 14px 0px $black,
  
   0px 15px 0px $black,
   1px 15px 0px $black,
   2px 15px 0px $black,
   3px 15px 0px $black,
   4px 15px 0px $black,
   5px 15px 0px $black,
   6px 15px 0px $black,
   7px 15px 0px $black,
   8px 15px 0px $black,
   9px 15px 0px $black,
  10px 15px 0px $black,
  11px 15px 0px $black,
  12px 15px 0px $black,
  13px 15px 0px $black,
  14px 15px 0px $black,
  15px 15px 0px $black;  
}

@mixin frame3 {
  box-shadow:
    1px 0px 0px $lightbrown,
    2px 0px 0px $lightbrown,
    3px 0px 0px $lightbrown,
    4px 0px 0px $lightbrown,
    5px 0px 0px $lightbrown,
    6px 0px 0px $lightbrown,
    7px 0px 0px $lightbrown,
    8px 0px 0px $lightbrown,
    9px 0px 0px $lightbrown,
   10px 0px 0px $lightbrown,
   11px 0px 0px $lightbrown,
   12px 0px 0px $lightbrown,
   13px 0px 0px $lightbrown,
   14px 0px 0px $lightbrown,
   
    0px 1px 0px $lightbrown,
    1px 1px 0px $darkbrown,
    2px 1px 0px $darkbrown,
    3px 1px 0px $darkbrown,
    4px 1px 0px $darkbrown,
    5px 1px 0px $darkbrown,
    6px 1px 0px $darkbrown,
    7px 1px 0px $darkbrown,
    8px 1px 0px $darkbrown,
    9px 1px 0px $darkbrown,
   10px 1px 0px $darkbrown,
   11px 1px 0px $darkbrown,
   12px 1px 0px $darkbrown,
   13px 1px 0px $darkbrown,
   14px 1px 0px $darkbrown,
   15px 1px 0px $black,
   
    0px 2px 0px $lightbrown,
    1px 2px 0px $darkbrown,
    2px 2px 0px $black,
    3px 2px 0px $darkbrown,
    4px 2px 0px $darkbrown,
    5px 2px 0px $darkbrown,
    6px 2px 0px $darkbrown,
    7px 2px 0px $darkbrown,
    8px 2px 0px $darkbrown,
    9px 2px 0px $darkbrown,
   10px 2px 0px $darkbrown,
   11px 2px 0px $darkbrown,
   12px 2px 0px $darkbrown,
   13px 2px 0px $black,
   14px 2px 0px $darkbrown,
   15px 2px 0px $black,
   
    0px 3px 0px $lightbrown,
    1px 3px 0px $darkbrown,
    2px 3px 0px $darkbrown,
    3px 3px 0px $darkbrown,
    4px 3px 0px $darkbrown,
    5px 3px 0px $lightbrown,
    6px 3px 0px $lightbrown,
    7px 3px 0px $lightbrown,
    8px 3px 0px $lightbrown,
    9px 3px 0px $lightbrown,
   10px 3px 0px $darkbrown,
   11px 3px 0px $darkbrown,
   12px 3px 0px $darkbrown,
   13px 3px 0px $darkbrown,
   14px 3px 0px $darkbrown,
   15px 3px 0px $black,
   
    0px 4px 0px $lightbrown,
    1px 4px 0px $darkbrown,
    2px 4px 0px $darkbrown,
    3px 4px 0px $darkbrown,
    4px 4px 0px $lightbrown,
    5px 4px 0px $lightbrown,
    6px 4px 0px $black,
    7px 4px 0px $black,
    8px 4px 0px $black,
    9px 4px 0px $lightbrown,
   10px 4px 0px $lightbrown,
   11px 4px 0px $darkbrown,
   12px 4px 0px $darkbrown,
   13px 4px 0px $darkbrown,
   14px 4px 0px $darkbrown,
   15px 4px 0px $black,
   
    0px 5px 0px $lightbrown,
    1px 5px 0px $darkbrown,
    2px 5px 0px $darkbrown,
    3px 5px 0px $darkbrown,
    4px 5px 0px $lightbrown,
    5px 5px 0px $lightbrown,
    6px 5px 0px $black,
    7px 5px 0px $darkbrown,
    8px 5px 0px $darkbrown,
    9px 5px 0px $lightbrown,
   10px 5px 0px $lightbrown,
   11px 5px 0px $black,
   12px 5px 0px $darkbrown,
   13px 5px 0px $darkbrown,
   14px 5px 0px $darkbrown,
   15px 5px 0px $black,
   
    0px 6px 0px $lightbrown,
    1px 6px 0px $darkbrown,
    2px 6px 0px $darkbrown,
    3px 6px 0px $darkbrown,
    4px 6px 0px $lightbrown,
    5px 6px 0px $lightbrown,
    6px 6px 0px $black,
    7px 6px 0px $darkbrown,
    8px 6px 0px $darkbrown,
    9px 6px 0px $lightbrown,
   10px 6px 0px $lightbrown,
   11px 6px 0px $black,
   12px 6px 0px $darkbrown,
   13px 6px 0px $darkbrown,
   14px 6px 0px $darkbrown,
   15px 6px 0px $black,
   
    0px 7px 0px $lightbrown,
    1px 7px 0px $darkbrown,
    2px 7px 0px $darkbrown,
    3px 7px 0px $darkbrown,
    4px 7px 0px $darkbrown,
    5px 7px 0px $black,
    6px 7px 0px $black,
    7px 7px 0px $darkbrown,
    8px 7px 0px $lightbrown,
    9px 7px 0px $lightbrown,
   10px 7px 0px $lightbrown,
   11px 7px 0px $black,
   12px 7px 0px $darkbrown,
   13px 7px 0px $darkbrown,
   14px 7px 0px $darkbrown,
   15px 7px 0px $black,
   
    0px 8px 0px $lightbrown,
    1px 8px 0px $darkbrown,
    2px 8px 0px $darkbrown,
    3px 8px 0px $darkbrown,
    4px 8px 0px $darkbrown,
    5px 8px 0px $darkbrown,
    6px 8px 0px $darkbrown,
    7px 8px 0px $lightbrown,
    8px 8px 0px $lightbrown,
    9px 8px 0px $black,
   10px 8px 0px $black,
   11px 8px 0px $black,
   12px 8px 0px $darkbrown,
   13px 8px 0px $darkbrown,
   14px 8px 0px $darkbrown,
   15px 8px 0px $black,
   
    0px 9px 0px $lightbrown,
    1px 9px 0px $darkbrown,
    2px 9px 0px $darkbrown,
    3px 9px 0px $darkbrown,
    4px 9px 0px $darkbrown,
    5px 9px 0px $darkbrown,
    6px 9px 0px $darkbrown,
    7px 9px 0px $lightbrown,
    8px 9px 0px $lightbrown,
    9px 9px 0px $black,
   10px 9px 0px $darkbrown,
   11px 9px 0px $darkbrown,
   12px 9px 0px $darkbrown,
   13px 9px 0px $darkbrown,
   14px 9px 0px $darkbrown,
   15px 9px 0px $black,

   0px 10px 0px $lightbrown,
   1px 10px 0px $darkbrown,
   2px 10px 0px $darkbrown,
   3px 10px 0px $darkbrown,
   4px 10px 0px $darkbrown,
   5px 10px 0px $darkbrown,
   6px 10px 0px $darkbrown,
   7px 10px 0px $darkbrown,
   8px 10px 0px $black,
   9px 10px 0px $black,
  10px 10px 0px $darkbrown,
  11px 10px 0px $darkbrown,
  12px 10px 0px $darkbrown,
  13px 10px 0px $darkbrown,
  14px 10px 0px $darkbrown,
  15px 10px 0px $black,
  
   0px 11px 0px $lightbrown,
   1px 11px 0px $darkbrown,
   2px 11px 0px $darkbrown,
   3px 11px 0px $darkbrown,
   4px 11px 0px $darkbrown,
   5px 11px 0px $darkbrown,
   6px 11px 0px $darkbrown,
   7px 11px 0px $lightbrown,
   8px 11px 0px $lightbrown,
   9px 11px 0px $darkbrown,
  10px 11px 0px $darkbrown,
  11px 11px 0px $darkbrown,
  12px 11px 0px $darkbrown,
  13px 11px 0px $darkbrown,
  14px 11px 0px $darkbrown,
  15px 11px 0px $black,

   0px 12px 0px $lightbrown,
   1px 12px 0px $darkbrown,
   2px 12px 0px $darkbrown,
   3px 12px 0px $darkbrown,
   4px 12px 0px $darkbrown,
   5px 12px 0px $darkbrown,
   6px 12px 0px $darkbrown,
   7px 12px 0px $lightbrown,
   8px 12px 0px $lightbrown,
   9px 12px 0px $black,
  10px 12px 0px $darkbrown,
  11px 12px 0px $darkbrown,
  12px 12px 0px $darkbrown,
  13px 12px 0px $darkbrown,
  14px 12px 0px $darkbrown,
  15px 12px 0px $black,

   0px 13px 0px $lightbrown,
   1px 13px 0px $darkbrown,
   2px 13px 0px $black,
   3px 13px 0px $darkbrown,
   4px 13px 0px $darkbrown,
   5px 13px 0px $darkbrown,
   6px 13px 0px $darkbrown,
   7px 13px 0px $darkbrown,
   8px 13px 0px $black,
   9px 13px 0px $black,
  10px 13px 0px $darkbrown,
  11px 13px 0px $darkbrown,
  12px 13px 0px $darkbrown,
  13px 13px 0px $black,
  14px 13px 0px $darkbrown,
  15px 13px 0px $black,

   0px 14px 0px $lightbrown,
   1px 14px 0px $darkbrown,
   2px 14px 0px $darkbrown,
   3px 14px 0px $darkbrown,
   4px 14px 0px $darkbrown,
   5px 14px 0px $darkbrown,
   6px 14px 0px $darkbrown,
   7px 14px 0px $darkbrown,
   8px 14px 0px $darkbrown,
   9px 14px 0px $darkbrown,
  10px 14px 0px $darkbrown,
  11px 14px 0px $darkbrown,
  12px 14px 0px $darkbrown,
  13px 14px 0px $darkbrown,
  14px 14px 0px $darkbrown,
  15px 14px 0px $black,

   0px 15px 0px $black,
   1px 15px 0px $black,
   2px 15px 0px $black,
   3px 15px 0px $black,
   4px 15px 0px $black,
   5px 15px 0px $black,
   6px 15px 0px $black,
   7px 15px 0px $black,
   8px 15px 0px $black,
   9px 15px 0px $black,
  10px 15px 0px $black,
  11px 15px 0px $black,
  12px 15px 0px $black,
  13px 15px 0px $black,
  14px 15px 0px $black,
  15px 15px 0px $black;
}


@include keyframes(block) {
   0% { @include frame1; }
  40% { @include frame2; }
  60% { @include frame3; }
  80% { @include frame2; }
}

.block {
  position: relative;
  width: 1px;
  height: 1px;
	-webkit-transition: none;
	-webkit-transform: scale(5); 
	-webkit-animation: block .9s step-end infinite;
  display: inline-block;
  margin-right: 75px;
}




              
            
!

JS

              
                
              
            
!
999px

Console