Ring Healthbar

Hi,
I want to create “HealthRing”. This ring should have every enemy and player. When my player or enemy get a damage, the part of the ring(circle) have to disappear. Do you have any idea how to create that “HealthRing”?

Please search before posting questions. There are many explanations of how to do this both on this site and using any popular internet search engine.

e.g.