[nightcracker]

Originally Posted by Amenity Wow guys...thank you for the quick responses! Working perfectly now. (Also bookmarking as a reference page)

If this is going to be a reference, then I'll add something new, a variable to determine speed of the pulse in seconds(don't set it to 0, dividing by 0 FTW):

local speed = 1
frame.mult = 1
frame.alpha = 1
frame:SetScript("OnUpdate", function(self, elapsed)
    elapsed = elapsed*(1/speed)
    self:SetAlpha(self.alpha)
    self.alpha = self.alpha - elapsed*self.mult
    if self.alpha < 0 and self.mult > 0 then
        self.mult = self.mult*-1
        self.alpha = 0
    elseif self.alpha > 1 and frame.mult < 1 then
        self.mult = self.mult*-1
    end
end)