WINDOWS 8 LOGO IN PURE CSS3 WITH ANIMATION

DEMO

Windows 8

CSS
.windows_8_logo_container {
 padding: 50px 0;
 background: #fff;
 height: 150px;
}

.window {
 position: relative;
 float: left;
 margin-left: 50px;
 width: 200px;
 height: 150px;
 background: #00adef;

 -webkit-transform: perspective(400px) rotateY(-25deg);
 -moz-transform: perspective(400px) rotateY(-25deg);
 -o-transform: perspective(400px) rotateY(-25deg);
 -ms-transform: perspective(400px) rotateY(-25deg);
 transform: perspective(400px) rotateY(-25deg);

 -webkit-animation: windows_animation 5s infinite;
 -moz-animation: windows_animation 5s infinite;
 -ms-animation: windows_animation 5s infinite;
 animation: windows_animation 5s infinite;
}

.window::after,.window::before {
 content: '';
 background: #fff;
 height: 100%;
 width: 10px;
 left: 50%;
 margin-left: -5px;
 top: 0;
 position: absolute;
}

.window::before {
 left: 0;
 top: 50%;
 margin-top: -5px;
 margin-left: 0;
 height: 10px;
 width: 100%;
 position: absolute;
}

.logo_text {
 color: #00adef;
 font: 120px/150px 'Arial';
 padding-left: 20px;
 float: left;
}

@keyframes "windows_animation" {
 0%,100% {
 -webkit-transform: perspective(400px) rotateY(-25deg);
 -moz-transform: perspective(400px) rotateY(-25deg);
 -o-transform: perspective(400px) rotateY(-25deg);
 -ms-transform: perspective(400px) rotateY(-25deg);
 transform: perspective(400px) rotateY(-25deg);
}
 50% {
    -webkit-transform: perspective(400px) rotateY(-35deg);
    -moz-transform: perspective(400px) rotateY(-35deg);
    -o-transform: perspective(400px) rotateY(-35deg);
    -ms-transform: perspective(400px) rotateY(-35deg);
    transform: perspective(400px) rotateY(-35deg);
 }

}

@-moz-keyframes windows_animation {
 0%,100% {
 -moz-transform: perspective(400px) rotateY(-25deg);
 transform: perspective(400px) rotateY(-25deg);
}
 50% {
   -moz-transform: perspective(400px) rotateY(-35deg);
   transform: perspective(400px) rotateY(-35deg);
 }

}

@-webkit-keyframes "windows_animation" {
 0%,100% {
 -webkit-transform: perspective(400px) rotateY(-25deg);
 transform: perspective(400px) rotateY(-25deg);
}
 50% {
   -webkit-transform: perspective(400px) rotateY(-35deg);
   transform: perspective(400px) rotateY(-35deg);
 }

}

@-ms-keyframes "windows_animation" {
 0%,100% {
 -ms-transform: perspective(400px) rotateY(-25deg);
 transform: perspective(400px) rotateY(-25deg);
}
 50% {
   -ms-transform: perspective(400px) rotateY(-35deg);
   transform: perspective(400px) rotateY(-35deg);
 }

}

-webkit-animation {
 -webkit-transform: perspective(400px) rotateY(-25deg);
 -moz-animation  {
  -webkit-transform: perspective(400px) rotateY(-25deg);
 -ms-animation  {
  -webkit-transform: perspective(400px) rotateY(-25deg);
 animation  {
  transform: perspective(400px) rotateY(-25deg);
 -moz-transform: perspective(400px) rotateY(-25deg);
 -o-transform: perspective(400px) rotateY(-25deg);
 -ms-transform: perspective(400px) rotateY(-25deg);
 transform: perspective(400px) rotateY(-25deg);
}
 50% {
    -webkit-transform: perspective(400px) rotateY(-35deg);
    -moz-transform: perspective(400px) rotateY(-35deg);
    -o-transform: perspective(400px) rotateY(-35deg);
    -ms-transform: perspective(400px) rotateY(-35deg);
    transform: perspective(400px) rotateY(-35deg);
 }

HTML<div class="windows_8_logo_container">
 <div class="window"></div>
 <div class="logo_text">Windows 8</div>
</div>