How to tween character transparency? (preferably on keybind)

Hello! So i am trying to make a code so that when the character teleports, their transparency fades out for a few seconds, then comes back. I am trying to tween the players transparency in player visiblity so it smoothly goes from 0-1-0, im super new to coding so bare with me. I want it to be connected to the teleport function like the other tweens so when you press the keybind it all happens at once, any help on what im doing wrong? or what i should do? Please and thank you! I've been looking all day. (note i just cut off the other codes for the tweens, i just copied the player visiblity cause its what im struggling with)

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-- PLAYER VISIBLITY --
local player = game:GetService("Players").LocalPlayer
local char = player.Character
local children = char:GetChildren()
local trtweenInfo = TweenInfo.new(1, Enum.EasingStyle.Quad, Enum.EasingDirection.InOut)
local trtween = game:GetService("TweenService")

for i, child in ipairs(children) do
	if child:IsA("BasePart") or child:IsA("MeshPart") then
		if child.Transparency == 0 then
			trtween:Create(child, trtweenInfo, {Transparency = 1,0}):Play()
		end
	end
end

-- TELEPORTATION -- these can be used on their owns individually
wait()
local Player = game:GetService("Players").LocalPlayer
local Mouse = Player:GetMouse()
local Range = 300
Mouse.KeyDown:Connect(function(key)
	local MousePosition = Mouse.Hit.Position
	local Distance  = (Player.Character.Head.Position - MousePosition).Magnitude
	if key == "t" and Distance <= Range then
		print("T was pressed")
		Tween:Play()
		TweenLight:Play()
		wait(1)
		Player.Character:MoveTo(MousePosition)
		Regular:Play()
		TweenLightDef:Play()
	end
end)
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