.skew {
    animation: skew 3s infinite;
  }

  @keyframes skew {
    0% {
      transform: none;
    }
    33% {
      transform: none;
    }
    33.3% {
      transform: skewX(30deg);
    }
    33.6% {
      transform: skewX(-30deg);
    }
    33.9% {
      transform: none;
    }
    66% {
      transform: none;
    }
    66.3% {
      transform: skewX(5deg);
    }
    66.6% {
      transform: skewX(-5deg);
    }
    66.9% {
      transform: none;
    }
    77% {
      transform: none;
    }
    77.3% {
      transform: skewX(15deg);
    }
    77.6% {
      transform: skewX(-15deg);
    }
    77.9% {
      transform: none;
    }
  }