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</div>

.container {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0,0,0,.15);
}

.dy-logo {
  width: 250px;
  height: 100px;
  border: 1px solid #000;
}

.mark {
  animation: rotation 2s linear infinite ;
  transform-origin: 50% 50%;
/*   commented out the `transform-box` to illustrate the default behavior of using the SVG's viewbox for the transform-origin */
  transform-box: view-box;
}

@keyframes rotation {
  to {
    transform: rotate(360deg);
  }
}