How do you design your progress bar?

I'm starting out with Lectora, so there may be ways I have not yet discovered here.

But I'm trying to get the Progress Bar to look a bit more interesting. I'm imagining something more rounded, maybe with some definition to it (not just flat). Something resembling what you might find in video game interfaces for health bars, experience bars, etc.

Has anyone had some good experiences in how to create more interesting designs for progress bars?