How to make a part generator?

To do something repeatedly, we use a form of loop. Since we want to do this indefinitely, a while loop is most appropriate.

while wait(10) do
    -- Every ten seconds, do the following:

    -- To make a brand new part:
    part = Instance.new("Part", workspace)
    -- Construct a new Part instance in the workspace
    -- Put the new object in the variable `part` so we can do stuff to it

    -- Or instead, to copy an existing part
    -- (only use this or the above, not both)
    part = game.ReplicatedStorage.FactoryObject:Clone()
    -- Make a Clone (exact copy) of a given object
    -- (may be in other places but I just picked
    -- ReplicatedStorage for this example)
    part.Parent = workspace
    -- Move that object into the workspace (otherwise it is invisible
    -- and essentially non-existent)

    part.Position = script.Parent.PartSpawner.Position
    -- Move the part to the position of a `PartSpawner` (example)
    -- For CSG objects, the above still works.

end