This (free) extension is based on vivus.js, a script created by Maxwell Ito: http://maxwellito.github.io/vivus/
Vivus is a lightweight JavaScript that allows you to animate SVGs, giving them the appearance of being drawn.
There are a variety of different animations available.
You can download the new extension through the Extension Manager (Menu->Tools->Extension Manager->Online Gallery).
or here
http://extensions.quickandeasywebbuilder.com/
PDF documentation is included in the download.