t flashes Spot CAM light at 3Hz / 80% brightness</p></li>
<li><p>the robot reaches the <em>end</em> to turn off the Spot CAM light and proceed to complete the rest of the mission</p></li>
</ul>
<p>Let’s take a look at the example to see how that can be done. We will go over some of the important lines in the <code class="docutils literal notranslate"><span class="pre">area_callback_crosswalk.py</span></code> example.</p>
<section id="initialization">
<h3>Initialization<a class="headerlink" href="#initiali