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This adds an eclipse timer and eclipse hidden cooldown timer to the Mirror bars for Quartz. It also tracks heroism and the T8 proc for boomkins.
To access the configuration options, type /quartz to bring up the quartz options, and then click 'Eclipse'.
You'll need Quartz installed (http://www.wowinterface.com/downloads/info7158-Quartz-ModularCastingBar.html) and have the Mirror module enabled (which it should be by default). Just put this addon into the WoW/Interface/Addons directory.