Is there a post difficulty level bar plugin for WordPress?

Hi Everybody,

I am new here. I am looking for a plugin that shows a difficulty level bar on the top of every post. If I post is easy to understand it should show a short green bar on the top of the post with a word “Easy”. If its Immediate it should show some mid-long orange bar on the top of the post. If its hard it should show a red bar on the top of the post.

Is there such plugin?

Thank you in advance

BR
Balázs