How to Resize a part from only one face?

[MadeInDark (MarcoPolo)]

You can write your topic however you want, but you need to answer these questions:

1. What do you want to achieve? how to Resize a part from only one face?,i want the part to extend like this [o--------]
   instead of like this [--------o--------]

2. What is the issue? my script resize 2 face of part

tweenservice:Create(asu,TweenInfo.new(1),{Transparency = 0,Size = Vector3.new(20,20,0), },Enum.EasingStyle.Quint,Enum.EasingDirection.Out):Play()
	wait(2)
	for i = 1,60 do
		wait()
		if i <= 60 then
			asu.Size += Vector3.new(0,0,1)
		elseif i >= 60 then
			print("done")
		end
	end
	wait()
    asu:Destroy()

[RoBoPoJu]

asu.Size += Vector3.new(0,0,1)
asu.CFrame *= CFrame.new(0, 0, .5)

[D0RYU (nici)]

@MadeInDark

		if i <= 60 then
			asu.Size += Vector3.new(0,0,1)
		elseif i >= 60 then
			print("done")
		end

these two if statements will both run if i is equal to 60
I think a normal else would be better

[MadeInDark (MarcoPolo)]

@D0RYU

these two if statements will both run if i is equal to 60
I think a normal else would be better

Thanks for the information bro.