<!DOCTYPE html>
<div style="border: 1px solid black; height: 50px">
<div style="width: 100px; height: 100px; background: black; opacity: 0.2;"></div>
</div>
<!DOCTYPE html>
<div style="border: 1px solid black; height: 50px">
<div style="width: 100px; height: 100px; background: black; opacity: 0.2;"></div>
</div>