How do I make a circle timer indicator/gauge

In game I want to have a pie type timer to indicate things. For instance, % of the level completed, a time indicator above a bomb needing to be defused, or maybe just a quick timer to indicate the user is busy building an object.

I was attempting to learn how to do dynamic material instance in order to mask part of the texture but I don’t understand how to do this inside of a circle around the center point.

Example video:

This should help you