<div style="
position: relative;
">
<div style="
left: 0;
position: absolute;
top: 0;
">
...
</div>
<div style="
position: absolute;
top: 0;
right: 0;
">
...
</div>
<div style="
bottom: 0;
position: absolute;
right: 0;
">
...
</div>
<div style="
bottom: 0;
left: 0;
position: absolute;
">
...
</div>
</div>