.modify_this{

color: purple;

font-weight: bold;

background-color: limegreen;

}

.modify_this_too{

color: brown;

}

<div class="modify_this">Modify this div with more stuff. This is the addtional sentence that I have decided to include.</div>

<div class="modify_this_too">This is the second div, but I really prefer numeric cardinals, it would be more awesome</div>