<article class="principle sevenb">
  <div class="shape a"></div>
  <div class="shape b"></div>
</article>

body {
  width: 100vw;
  heigth: 100vh;
  background: #e9b59f;
  overflow: hidden;
}

.sevenb .shape.a {
  animation: sevenb 3s infinite linear;
  top: calc(50% - 2em);
  left: calc(50% - 9em);
  transform-origin: 10em 50%;
}
.sevenb .shape.b {
  animation: sevenb 6s infinite linear reverse;
  background-color: yellow;
  width: 2em;
  height: 2em;
  left: calc(50% - 1em);
  top: calc(50% - 1em);
}

@keyframes sevenb {
  100% {
    transform: rotateZ(360deg);
  }
}

.principle {
  width: 100%;
  height: 100vh;
  position: relative;
}

.shape {
  background: #2d97db;
  border: 1em solid #fff;
  width: 4em;
  height: 4em;
  position: absolute;
  top: calc(50% - 2em);
  left: calc(50% - 2em);
}