Visualize Requirements based on Tagged Values

[eriksmith200]

I have defined a Tagged Value for Requirement called Completion, an Enum with values 0,25,50,75,100.
Based on the value of Completion, I would like the visualization of the requirement in a diagram to contain an empty circle, a circle with a quarter filled, a circle half filled, etc.

I'm trying to create a shape script for a stereotype, but there are a few things I can't seem to figure out:
1. Is it possible to add to the visualization of Requirement without overwriting it? Can I maybe find the original shape script for Requirement somewhere?
2. How do I apply a stereotype to a requirement?
3. Is there another approach towards what I want to achieve?

[JT]

This is exactly what I have done and would also like to figure out how to do.  Thanks.