How would I save the CFrame of a brick before it is changed?

I have a tweening script that would tween bricks to its position in a model. However, when I run it, I end up with this. Any help? Here is the code.

ts = game:GetService('TweenService')
CValues = {}

wait(5)

BuildBrick = function(v)
	local info = TweenInfo.new(
		1,
		Enum.EasingStyle.Back,
		Enum.EasingDirection.Out,
		0,
		false,
		0
	)	
	local goals = {
		Transparency = 0;
		CFrame = CValues[1]
	}
	
	local tween = ts:Create(v,info,goals)
	tween:Play()
end

for i,v in next, workspace.FM.Model:GetChildren() do
	table.insert(CValues, 1, v.CFrame)
	v.Transparency = 1
	v.CFrame = workspace.FPos.CFrame
	spawn(function() BuildBrick(v) end)
end