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<template>

  <div class="parentBox">

    <div class="contantBox"></div>

  </div>

</template>

<style lang="less" scoped>

.parentBox {

  height: 100%;

  background: rgb(31, 31, 31);

  padding: 100px;

  @keyframes filterBallMove {

    50% {

      left: 140px;

    }

  }

  @keyframes filterBallMove2 {

    50% {

      right: 140px;

    }

  }

  .contantBox {

    position: absolute;

    top: 50%;

    left: 50%;

    transform: translate(-50%, -50%);

    width: 300px;

    height: 200px;

    filter: contrast(20);

  }

  .contantBox::before {

    content: "";

    position: absolute;

    width: 120px;

    height: 120px;

    border-radius: 50%;

    background: olive;

    top: 40px;

    left: 80px;

    z-index: 2;

    filter: blur(6px);

    box-sizing: border-box;

    animation: filterBallMove 4s ease-out infinite;

  }

  .contantBox::after {

    content: "";

    position: absolute;

    width: 80px;

    height: 80px;

    border-radius: 50%;

    background: green;

    top: 60px;

    right: 40px;

    z-index: 2;

    filter: blur(6px);

    animation: filterBallMove2 4s ease-out infinite;

  }

}

</style>

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<template>

  <div class="parentBox">

    <div class="contantBox">

      <h1>hello Word!</h1>

    </div>

  </div>

</template>

<style lang="less" scoped>

.parentBox {

  height: 100%;

  background: rgb(31, 31, 31);

  padding: 100px;

  .contantBox {

    width: 100%;

    height: 100%;

    position: relative;

    padding: 4em;

    filter: contrast(20);

    overflow: hidden;

    background: rgb(0, 0, 0);

    h1 {

      font-family: Righteous;

      color: white;

      font-size: 4rem;

      text-transform: uppercase;

      line-height: 1;

      animation: letterspacing 3s infinite alternate ease-in-out;

      display: block;

      position: absolute;

      left: 50%;

      top: 50%;

      transform: translate3d(-50%, -50%, 0);

      letter-spacing: -2.2rem;

    }

  }

  @keyframes letterspacing {

    0% {

      letter-spacing: -2.4rem;

      filter: blur(0.3rem);

    }

    50% {

      filter: blur(0.5rem);

    }

    100% {

      letter-spacing: 0.5rem;

      filter: blur(0rem);

      color: #fff;

    }

  }

}

</style>