what are the three rectangular looking bars next to the sign(and below the Health) in the HUD top left

+
what are the three rectangular looking bars next to the sign(and below the Health) in the HUD top left

As the title said, next to your active sign on the top left, there are three rectangle bars. Since i am mostly a quen user, i noticed that the rectangles go red in colour randomly. What do the 3 rectangles do?

ps the rectangles are not lined up in a str8 line, but rather lined up like a curve
 
Top Bottom