Sample animation... showing SetFromAlpha and SetToAlpha apparently backward

animation.lua

if TST then
   TST:Hide()
end
TST = CreateFrame("Frame")
local f = TST

f:SetSize(1,1)
f:SetScale(2) -- show pixels / zoom
local tg = f:CreateTexture()

tg:SetTexture(516954) -- interface/timer/hordeglow-logo.blp
tg:SetBlendMode("ADD")
tg:SetAlpha(0) -- start with no glow

local glow = tg:CreateAnimationGroup()
local anim = glow:CreateAnimation("Alpha")
anim:SetFromAlpha(.25)  -- backward... should be To??
anim:SetToAlpha(0)
--anim:SetSmoothing("IN")
--glow:SetLooping("BOUNCE")
anim:SetDuration(2)
--anim:SetOrder(1)

local tl = f:CreateTexture()
tl:SetTexture(516953) -- interface/timer/horde-logo.blp

tg:SetPoint("TOP")
tl:SetPoint("TOP")

f:SetPoint("TOP")
f:Show()
glow:Play(true)