Conrtol Object position and properties with JavaScript

Is it possible to control a shape's properties such as position, scale, rotation, color, and transparency using Javascript?  There are a few posts by people who say they have done it but none explicitly saying how by providing the steps they took to achieve it or the JavaScript code showing how Storyline objects are accessed.  As far as I can tell JavaScript can only access Storyline variables and player functions but there doesn't seem to be a way to call an object by name and do something with it.

I would like to now how to include an animation library such as GSAP and be able to manipulate objects using it. 

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