Genetica is so multifaceted that it is difficult to give a general explanation of how do things. You can make the same thing in many different ways. Only by experimenting and analyzing examples posted in this forum you gradually understand the power of this software. I still discover new ways of doing things and new capabilities of this software. Concerning the animation any node that has a clock allows to do animation within the capabilities of the node.
In general you have to design the abstract object you want first by using the nodes and than you choose within a node the part you want to animate.
In the vortex example the vortex was designed first without any animation and than a "move and repeat" node was inserted under the canvas node that was used to create a multi-color bar. The move and repeat node was used to animate an upward movement of the bar that created the animated effect of the vortex.
BTW the canvas node is very powerful and an easy way to understand some of Genetica's capabilities.