.dv-decoration-4 {
  position: relative;
  width: 100%;
  height: 100%;

  .container {
    display: flex;
    overflow: hidden;
    position: absolute;
    flex: 1;
  }

  .normal {
    animation: ani-height ease-in-out infinite;
    left: 50%;
    margin-left: -2px;
  }

  .reverse {
    animation: ani-width ease-in-out infinite;
    top: 50%;
    margin-top: -2px;
  }

  @keyframes ani-height {
    0% {
      height: 0%;
    }

    70% {
      height: 100%;
    }

    100% {
      height: 100%;
    }
  }

  @keyframes ani-width {
    0% {
      width: 0%;
    }

    70% {
      width: 100%;
    }

    100% {
      width: 100%;
    }
  }
}