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HTML

              
                .errorBox
  header
    h1 ../404.html
    a.close(href="#") &times;
  
  .content
    i.icon-error(aria-hidden="true") error
      svg(viewbox="0 0 40 40")
        circle(cx="20", cy="20", r="20")
        line(x1="10", y1="10", x2="30", y2="30")
        line(x1="30", y1="10", x2="10", y2="30")
    p The page was not found
  
  footer
    button WHOOPS
              
            
!

CSS

              
                html,body
  height 100%;

body
  display flex; align-items center; justify-content center;
  background: #303030;
  font-family: "Open Sans", sans-serif;
  overflow: hidden;
  
//--icon
.icon-error
  display block; 
  font-size: 0px; color $transparent;

  svg
    display block; width 100%; height 100%;
    circle
      fill #a50000;

    line
      stroke: #fff;
      stroke-width: 2px;

//--box
.errorBox
  position: absolute;
  min-width 350px;
  background: #fff;
  font-size: 0.9em;
  border: 1px solid #2d89ef;
  box-shadow: 0 3px 12px rgba(#000,0.5);
  animation bounce 0.15s ease-in
    
  &.out
    animation bounce-out 0.1s ease;

  header
    display flex; align-items: center
    background #f0f0f0; padding: 8px 10px;
    border-bottom 1px solid #e0e0e0;
    h1
      width 100%;
    
    a.close
      font-size: 1.5em;
      text-decoration none;
      color: #000;
  
  .content
    display: flex; align-items: center;
    padding: 30px 20px;
    
    i.icon-error
      width 40px; height 40px;
    p
      padding 0 10px;
  
  footer
    display flex; justify-content: flex-end;
    background #f0f0f0; padding: 8px 10px;
    border-top 1px solid #e0e0e0;
    
    button
      padding: 6px 12px;
      background #d9d9d9;
      font-family: 'Open Sans', serif;
      border: 1px solid #c0c0c0;
      border-radius 0;
      
      &:focus
        border-color: #2d89ef;
        
      &:active
        border-color: #2b5797;

      &::-moz-focus-inner
        border: 0;

@keyframes bounce
  0%
    transform scale(0);
  100%
    transform scale(1);

@keyframes bounce-out
  0%
    transform scale(1);
  100%
    transform scale(0);
              
            
!

JS

              
                $(function (){ 
    setInterval(function(){
      if( $('.errorBox').length > 20){
        console.log($('.errorBox').length)
        var firstBox = $('.errorBox').first().addClass('out')
        firstBox.one("animationend webkitAnimationEnd", function(){
          firstBox.remove();
        })
      }

      var box = $('.errorBox').last().clone();
      $('body').append(box);
      $(box).css({
        'top': Math.random() * (100 - 0) + (0)+'%',
        'left': Math.random() * (100 - 0) + (0)+'%',
      });
    }, 500);
});
              
            
!
999px

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