UIOBJECT Cooldown

Cooldown (inherits from ) is a specialized variety of Frame that displays the little "clock" effect over abilities and buffs. It can be set with its running time, whether it should appear to "fill up" or "empty out", and whether or not there should be a bright edge where it's changing between dim and bright.

Cooldowns are usually children of another frame, and typically set to cover the same area as that frame, or almost all of it. In the stock UI, they are used mostly to display cooldowns on action buttons and buffs or debuffs on targets.