Below is the head hierarchy and code for the blinking animation.
--"Eyes" refer to face decal
function Blink()
local Tween1 = TweenService:Create(Eyes, Settings.TweenInfo, {Transparency = 1})
Tween1:Play();
wait(Settings.TweenInfo.Time)
local Tween1 = TweenService:Create(Eyes, Settings.TweenInfo, {Transparency = 0})
Tween1:Play();
end