9C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Listen to the property change</h2>
<ul>
<li>on <strong>Behaviors</strong> tab, click on <strong>Person</strong> model (on the right panel under <em>Models</em>),</li>
<li>click on the <strong>+</strong> button on the left toolbar to add a new behavior,</li>
<li>a dialog i