rendered animation
1<section class="ctnr"> 2 <div class="ldr"> 3 <div class="ldr-blk"></div> 4 <div class="ldr-blk an_delay"></div> 5 <div class="ldr-blk an_delay"></div> 6 <div class="ldr-blk"></div> 7 </div> 8</section>