Spinner

<div class="env-spinner">
   <div class="env-rect1"></div>
   <div class="env-rect2"></div>
   <div class="env-rect3"></div>
   <div class="env-rect4"></div>
   <div class="env-rect5"></div>
</div>

Use env-spinner--hide to hide the spinner. i.e env-spinner env-spinner--hide