<div class="loading-spinner"></div>
.loading-spinner {
  display: inline-block;
  width: 100px;
  height: 100px;
  border: 10px solid rgba(230, 230, 230, .3);
  border-radius: 50%;
  border-top-color: #3dc9e5;
  animation: spin 1s ease-in-out infinite;

@keyframes spin {
  to { transform: rotate(360deg); }
// recreating https://codepen.io/scottkellum/pen/tzjCK
// just to learn how he did it
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