.layout {
  display: grid;
  grid-template-columns: 1fr 4fr;
  height: 100vh;
  width: 80%;
  padding-top: 25px;
  gap: 1rem;
}
.nav {
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.profile-pic {
  border-radius: 50%;
  width:100px;
  height:100px;
}

#cont{
  background: linear-gradient(to top left, #28b487, #7dd56f);
  width: 100%;
  border-radius: 50%;
  padding: 10px;
  margin: 0;
  line-height: 0;
  position: relative;
  animation: rotate 5.2s infinite linear;
 }
  
#box{
  background: #000000;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  padding: 0;
  margin: 0;
}


@keyframes rotate {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(1turn);
  }
}

<div class="layout">
  <div class="nav">
  <!--  a div dynamically positioned on page... -->
  
    <!--  content to animate -->
    <div id="cont">
      <!--  keep this still -->
      <div id="box">
        <img src="maple.jpg" class="profile-pic">
      </div>
    </div>
    
    
  </div>
</div>