Okay, it sounds like you’re looking for a custom-designed UI.
For that degree of customization, you should probably get a copy of the source code and read through the guide for how to use the FSM UI toolkit. It exists to make it easier for people to create their own interfaces.
The “Baton” UI might be a good starting point, since it already has the stepped ramp as you described, it’s a good introduction to the tools, and it may only need a strobe added.