Make someone teleport specific # of studs forward? (no script made)

place in localScript in starterPack:

local root = game.Players.LocalPlayer.CharacterAdded:Wait():WaitForChild("HumanoidRootPart")

game:GetService("UserInputService").InputBegan:Connect(function(input, process)
	if process then return end
	
	if input.UserInputType == Enum.UserInputType.MouseButton1 then
		root.CFrame = root.CFrame * CFrame.new(0, 0, -15)
	end
end)

i presume i reserve the right to not explain the stuff to u; u can find it out urself its simple enough im trying my luck that as to whether the answer will get accepted anyway