Example of a <a href="https://en.wikipedia.org/wiki/DFA" class="extiw" title="w:DFA">DFA</a> that accepts binary numbers that are multiplies of 3.
<a href="https://en.wikipedia.org/wiki/User:Mormegil" class="extiw" title="w:User:Mormegil">Petr Kadlec</a>
own work, created in MS Visio