HTML CSS

<h1 id="title-text">BLACK MIRROR</h1>

#title-text {
    animation-name: scale;
    animation-duration: 3s;
    animation-timing-function: linear;

    /* value is 1 in finished animation */
    animation-iteration-count: infinite;

    /* without this, it will move in a diagonal direction.
    The default origin is the top left corner. */
    transform-origin: center;
  }

  @keyframes scale {
    to {
      scale: 1.05;
    }
  }

  /* general styles */

  body {
    height: 100dvh;
    margin: 0;

    display: grid;
    place-items: center;

    background-color: #000;
    color: white;
  }