three-block-in-inlines-cascading-margins-ref.html

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<!DOCTYPE html>

<title>CSS Reference</title>

<style>

.container { width: 100px; }

.a { width: 100px; height: 20px; margin-bottom: 30px; background: blue; }

.b { width: 100px; height: 20px; margin-top: 20px; margin-bottom: 40px; background: green; }

.c { width: 100px; height: 20px; margin-top: 50px; background: orange; }

</style>

<p>Three rectangles separated by 30px and 50px gaps respectively.</p>

<div class="container">

    <div class="a"></div>

    <div class="b"></div>

    <div class="c"></div>

</div>