Hi Edward @EAR and welcome back!
Some leads that might interest you.
To move an Asset, you have a list of actions that modify Position, Size and Orientation here and you can use them in combination of Animations principles.
In order to move elements randomly, you can use a Random Number Generator Interface Asset in order to generate a random X and Y coordinates, then uses them as a binding in your animation.
You may also want to check Conditional Triggers for generating “smart” X/Y values. If you want to be sure to create some movement, if an object is the second right half of the screen, generate coordinates that will be in the first left half.