.dropdownSpinner {

  border: 2px solid #f3f3f3; /* Light grey */
  border-top: 2px solid #3498db; /* Blue */
  border-bottom: 2px solid pink; /* Blue */

  border-radius: 50%;
  width: 20px;
  height: 20px;
  animation: spin 2s linear infinite;

  display: none;
}

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

#mapSpinner {
  position: absolute;

  margin: auto;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;

  border: 4px solid #f3f3f3;
  border-top: 4px solid #3498db;
  border-bottom: 4px solid pink;

  border-radius: 50%;
  width: 75px;
  height: 75px;
  animation: spin 2s linear infinite;

}