html,
body {
  height: 100%;
  margin: 0;
  font-family: "Comic Sans Ms", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
}

h1 {
  position: relative;
  text-transform: uppercase;
  letter-spacing: 6px;
  font-size: 5vw;
  font-weight: 900;
  text-decoration: none;
  color: white;
  display: inline-block;
  background-size: 120% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  -moz-background-clip: text;
  -moz-text-fill-color: transparent;
  -ms-background-clip: text;
  -ms-text-fill-color: transparent;
  background-clip: text;
  background-image: linear-gradient(45deg, #40bc00, #164b00, #be1717, #be1717);
  animation: 0.8s shake infinite alternate;
}

@keyframes shake {
  0% {
    transform: skewX(-15deg);
  }

  5% {
    transform: skewX(15deg);
  }

  10% {
    transform: skewX(-15deg);
  }

  15% {
    transform: skewX(15deg);
  }

  20% {
    transform: skewX(0deg);
  }

  100% {
    transform: skewX(0deg);
  }
}