A fun thing I made to practice JavaScript DOM manipulation. Visit the web page to try... It's strangely addicting!
Fun fact: the initial html <body> for this is barely 8 lines:
<header>
<h1><div> block art</h1>
<p>Click on boxes to split them and randomize their color!</p>
</header>
<section>
<div class="first art"></div>
</section>
<script src="div-art.js"></script>