Play the RaidWarning sound

/run PlaySound ("RaidWarning");

Play RaidWarning sound if target exist

/run if UnitExists("target") then PlaySound ("RaidWarning"); else end

Check that you have proper druid HoTs on you

/script local i=0 g=GetPlayerBuff while not(g(i) == -1)do if(strfind(GetPlayerBuffTexture(g(i)), "Spell_Nature_Rejuvenation"))then PlaySoundFile("Sound\Creature\Ossirian\OssirianIAmRejuvenated.wav")end i=i+1 end