An interactive heads up display for the holy priest's "Flash Concentration" legendary.
-Stacking indicators for your buff count.
-Duration bar to track how long remains for buff.
-Colour key's to help with recasting;
=Orange will warn you that there remains less than 3 seconds to reapply the buff.
=Red indicates that the remaining duration is below the 1.4 seconds cast time of 'Flash Heal' and thus you will be unable to maintain the buff if you now start casting flash heal. (Unless of course you have a surge of light proc.)