Color Change to various types

I am trying to change the color of all items on and under a specific layer.

I have been successful changing the color of specific types of objects (paths), but I need to accommodate all the types on the layer and sub layers.

I can recurse to as many sub layers as I expect, but how do I accommodate the page Items, path Items, group Items, compound Path Items, etc.

I was thinking of pushing everything to an array, but I have no experience with arrays...

Thanks for your help.