When I added a weld and scripted it, it won't work?

local Model = script.Parent
	local Main = Model:WaitForChild('Main')
	local OtherPart = Model:WaitForChild('Part')
local parts = Model:GetChildren()
for i = 1, #parts do
   if ((#parts[i].ClassName == 'Part')) then
	  local Weld = Instance.new("Weld",Main)
      Weld.C0 = Main.CFrame:inverse() * OtherPart.CFrame
      Weld.Part0 = Main
      Weld.Part1 = OtherPart
   end
end

I was trying to make a weld part for my new cafe but when I tried to make it, it didn't work?