Why is this script for a part not doing anything?

I don't know if I forgot something or just plain screwed up. Here's the script right here:

x = 4
for i = 1,50 do
	part = Instance.new("Part")
	part.Position = Vector3.new(0,0,x)
	part.Size = Vector3.new(4,1,4)
	part.TopSurface = 0
			local x = x+4
		wait(.03)
end

You forgot to assign the Parent, which would be workspace. Keep in mind Vector3's stack on top of each other, CFrame actually goes to the position you request. But you might need to anchor it, or else it'll spaz out.

x = 4
for i = 1,50 do
    part = Instance.new("Part",workspace)
    part.Position = Vector3.new(0,0,x)
    part.Size = Vector3.new(4,1,4)
    part.TopSurface = 0
            local x = x+4
        wait(.03)
end