inter is a procedure that takes a frame and draws its image within the frame.</li>
</ul>
<h2 id="3" class="anchor">
<a class="anchor__link link" href="#3" aria-hidden="true">#</a> Part 3
</h2>
<h3 id="3.1" class="anchor">
<a class="anchor__link link" href="#3.1" aria-hidden="true">#</a> Importance of closure
</h3>
<ul>
<li>Representing painters as procedures is nice because the means of combination just falls out, and you automatically get the closure property.</li>
<li>The procedures <code>beside</code> an