.loader {
  border-left: 16px solid #f3f3f3;  
  border-right: 16px solid #f3f3f3;  
  border-bottom: 16px solid #f3f3f3;   

  border-top: 16px solid rgba(118, 197, 252, 0.5);
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
  margin-top: 100px;
  margin-bottom: 100px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}