<!DOCTYPE html>
<html>
   <head>
      <style>
         body{
            font-family: "Helvetica";
            color: white;
            background: red;
            background: linear-gradient(to bottom right, hsl(150, 60%, 50%) 10%, hsl(180, 100%, 50%) 90%) no-repeat;
            background-size: 100%;
            margin: 0;
            padding: 20px;
            padding-bottom: 100%;
         }

         h1, p{
            text-align: center;
         }
         div{
            margin-left: auto;
            margin-right: auto;
         }

         .triangle{
            width: 0;
            height: 0;
            border-top: 0px solid transparent;
            border-left:   50px solid transparent;
            border-right:  50px solid transparent;
            border-bottom: 70px solid black;
         }
         .container{
            width: 210px;
            height: 140px;
            position: relative;
            perspective: 1000;
         }

         #pyramid{
            opacity: 50%;
            width: 100%;
            height: 100%;
            position: absolute;
            transform-style: preserve-3d;
            transform: translateZ( -100px );
            animation: spinPyramid 3s infinite linear;
         }

         #pyramid figure{
            display: block;
            position: absolute;
            backface-visibility: none;
         }
         #pyramid figure.base{
            backface-visibility: 100%;
            background-color: lightgrey;
            transform: rotateX(90deg) translateZ(-10px);
            width: 100px;
            height: 100px;
         }
         #pyramid figure:nth-child(1){
            transform: rotateY(0deg) translateZ(25px) rotateX(45deg);
            border-bottom-color: red;
         }
         #pyramid figure:nth-child(2){
            transform: rotateY(90deg) translateZ(25px) rotateX(45deg);
            border-bottom-color: green;
         }
         #pyramid figure:nth-child(3){
            transform: rotateY(180deg) translateZ(25px) rotateX(45deg);
            border-bottom-color: blue;
         }
         #pyramid figure:nth-child(4) {
            transform: rotateY(-90deg) translateZ(25px) rotateX(45deg);
         }

         @keyframes spinPyramid{
            0%   {transform: translateZ(-100px)   rotateX(   0deg ) rotateY(   0deg );}
            100% {transform: translateZ( -100px ) rotateX( 360deg ) rotateY( 360deg ); }
         }

         #cia{
            max-width: 100%;
            max-height: 100%;
         }
      </style>


   </head>
   <body>
      <h1>Pyramid Test</h1>
      <div class="container">
         <div id="pyramid">
            <figure class="triangle"></figure>
            <figure class="triangle"></figure>
            <figure class="triangle"></figure>
            <figure class="triangle"></figure>
            <figure class="base"><img id="cia" src="http://logonoid.com/images/cia-logo.png" alt="CIA"></figure>
         </div>
      </div>
      <p>Gotta go  fast!</p>
   </body>
</html>