<div class="block">
  <p class="txt">HYDRANGEA</p>
</div>

.block{
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  .txt{
    font-family: futura;
    letter-spacing: 0.1em;
    font-size: 100px;
    font-weight: bold;
    color: transparent;
    background-clip: text;
    -webkit-background-clip: text;
    background-image: url(http://ajsai.jp/wp-content/themes/ajsai-theme/images/non-thumbnail.jpg);
    animation: bgAnimation 10s linear infinite;
    -webkit-animation: bgAnimation 10s linear infinite;
  }
}
@keyframes bgAnimation {
    from { background-position: 0px center; }
    to { background-position: 2000px center; }
}
@-webkit-keyframes bgAnimation {
    from { background-position: 0px center; }
    to { background-position: 2000px center; }
}