html, body {
    margin: 0; padding: 0;
  }
  .hero-bkg-animated {
     background: gray url(../img/geometry2.png) repeat 0 0;
    width: 100%;
    margin: 0;
   
    height: 100%;
 
    box-sizing: border-box;
    -webkit-animation: slide 20s linear infinite;
  }
  
  .hero-bkg-animated h1 {
    font-family: sans-serif;
  }
  
  @-webkit-keyframes slide {
      from { background-position: 0 0; }
      to { background-position: -400px 0; }
  }