Use this for indicating Ajax loads.
<div class="ds-block">
<div class="ds-sk-fading-circle">
<div class="ds-sk-circle1 ds-sk-circle"></div>
<div class="ds-sk-circle2 ds-sk-circle"></div>
<div class="ds-sk-circle3 ds-sk-circle"></div>
<div class="ds-sk-circle4 ds-sk-circle"></div>
<div class="ds-sk-circle5 ds-sk-circle"></div>
<div class="ds-sk-circle6 ds-sk-circle"></div>
<div class="ds-sk-circle7 ds-sk-circle"></div>
<div class="ds-sk-circle8 ds-sk-circle"></div>
<div class="ds-sk-circle9 ds-sk-circle"></div>
<div class="ds-sk-circle10 ds-sk-circle"></div>
<div class="ds-sk-circle11 ds-sk-circle"></div>
<div class="ds-sk-circle12 ds-sk-circle"></div>
</div>
</div>