codepens/4-big-cubes-animation-with-svg-use-and-css-variables/dist/style.css

body {
  font-family: "Roboto", sans-serif;
  margin: 0 auto;
  max-width: 500px;
}

.cube-unit {
  fill-opacity: 0.9;
  stroke-miterlimit: 0;
}

.blue-cube {
  --mainColor: #009CDE;
  --strokeColor: #0079ad;
  --lightColor: #00affa;
  --darkColor: #008bc7;
}

.pink-cube {
  --mainColor: #de0063;
  --strokeColor: #ad004e;
  --lightColor: #fa0070;
  --darkColor: #c7005a;
}

@keyframes moveX {
  to {
    transform: translateX(var(--translate, 35px));
  }
}
@keyframes moveY {
  to {
    transform: translateY(var(--translate, -35px));
  }
}
.m-left, .m-right {
  animation: 2s moveX alternate infinite paused;
}

.m-up, .m-down {
  animation: 2s moveY alternate infinite paused;
}

.m-left {
  --translate: -50px;
}

.m-right {
  --translate: 50px;
}

svg:hover * {
  animation-play-state: running;
}