CSS
1
Вклад в тег
<style>
.wraper{
width: 200px;
}
.blue{
width: 100%;
height: 50px;
background:blue;
}
.grey{
width: 50%;
height: 50px;
background: grey;
float:left;
}
.pink{
width: 50%;
height: 50px;
background: pink;
float:left;
}
</style>
<div class="wraper">
<div class="blue"></div>
<div class="grey"></div>
<div class="pink"></div>
<div style="clear:both"></div>
</div>