app/views/layouts/_loader.html.erb
<div id="loader">
<div class="f_circleG" id="frotateG_01"></div>
<div class="f_circleG" id="frotateG_02"></div>
<div class="f_circleG" id="frotateG_03"></div>
<div class="f_circleG" id="frotateG_04"></div>
<div class="f_circleG" id="frotateG_05"></div>
<div class="f_circleG" id="frotateG_06"></div>
<div class="f_circleG" id="frotateG_07"></div>
<div class="f_circleG" id="frotateG_08"></div>
</div>