.logo {
    position: relative;
    width: 50%;
    margin: 30px;
    transform: scale(1);
    transition: all 1s;
  }
  .logo.css {
    animation-delay:1s;
  }
  .logo.animated {
    animation: 2s pulsate infinite alternate ease-in-out;
  }
  .logo:before,
  .logo:after {
    position: absolute;
    left: 50px;
    top: 0;
    width: 50px;
    height: 80px;
    transform: rotate(-45deg);
    transform-origin: 0 100%;
  }
  .logo:after {
    left: 0;
    transform: rotate(45deg);
    transform-origin :100% 100%;
  }

  @keyframes pulsate {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
  }