Save slots and gauges - programming/coding

Heyo!

I'm working on a project right now and could really use some help regarding my save slots and a gauge.

Firstly, I want to attempt layering the png of the slots and the actual save. To describe it as best as I can:

1. Bottom layer: The full png of the normal slot + the hovered one.

2. On top of it: The save.

3. On top of the save: A kind of frame.

Does anyone know how to do this?

Secondly, the gauge(s). I think I've saved the pngs down as they should be, so it's just an issue with the programming aspect. For example: I want it to be rather dynamic and attached to a score. If the score is 10, it'll show the gauge filled in at 10%-ish. If it's 27%, it'll mimic that too, etc.

Thanks in advance! 😊