<div class="block1">
<div class="block2" style="color:#FFF">
</div>
<div class="block1">
<div class="block2" style="color:#FF0">
</div>
<div class="block1">
<div class="block2" style="color:#FFF">
</div>
<div class="block1">
<div class="block2" style="color:#000">
</div>
<div class="block1 block1_bg_white">
<div class="block2">
</div>
</div>
.block1_bg_white {
font-size: 16px;
.block2 {
background: white;
}
}