Sample image of a <a href="https://en.wikipedia.org/wiki/B%C3%A9zier_curve" class="extiw" title="w:Bézier curve">Bézier curve</a>
<a href="//commons.wikimedia.org/wiki/User:MarianSigler" title="User:MarianSigler">MarianSigler</a>
Self-drawn using gedit, based on <a href="//commons.wikimedia.org/wiki/File:Bezier.png" title="File:Bezier.png">Bezier.png</a>