How to make this auto-filling text and logo animation?
Just a proof of concept. Steps to reproduce:


on a new comp, create a shape object filled with black color;
animate some properties, in this case, I'm changing the Inner Radius;
duplicate this shape layer and move it a few frames ahead in the timeline (so it's out of sync with the layer below);
change its color to white and activate the Track Matte pointing to the first layer as Parent;


This is the result (showing all the frames at once):



And this is the base composition: