<!DOCTYPE html>
<style>
body {
    font-family: 'SerenitySans';
}
#foo {
    background-color: red;
    margin-bottom: 25px;
    width: 100px;
    height: 100px;
}
#bar {
    background-color: green;
    margin-top: 100px;
    width: 200px;
    height: 200px;
}
#baz {
    background-color: blue;
    width: 100px;
    margin-top: -50px;
    height: 100px;
}
</style>
<div id=foo></div>
<div id=bar><div id=baz></div></div>
