body {
    margin:0;
    background:#000;
  }
  
  #sky {
    background:url(https://cdn.rawgit.com/ManzDev/cursos-assets/gh-pages/css3/monkey-sky.png) repeat-X;
    animation: movebg 9s linear infinite;
  }
  
  #sea {
    background:url(https://cdn.rawgit.com/ManzDev/cursos-assets/gh-pages/css3/monkey-sea.png) repeat-x;
    box-shadow:10px 10px 45px RGBA(0,0,0, 0.95) inset;
    animation: movebg 7s linear infinite;
    position:relative;
    top:145px;
  }
  
  @keyframes movebg {
    0% { background-position:550px }
    100% { background-position:0 }
  }
  
  #gb {
    width:104px;
    height:150px;
    background:url(https://cdn.rawgit.com/ManzDev/cursos-assets/gh-pages/css3/monkey-guybrush.png) no-repeat;
    animation:gbwalk 1s steps(6) infinite;
    margin:auto;
    position:relative;
    bottom:34px;
    /* Ojo, muy costoso en rendimiento */
    /* filter:drop-shadow(5px 5px 5px #000); */
  }
  
  @keyframes gbwalk {
    0% { background-position:0 }
    100% { background-position:-624px }
  }