How to make a Object Spawner?

i want to know how to make a item spawner every so long Ex: star drops ever 180 seconds and despawns 50 seconds later

You can achieve this by using Debris and Instance.new() or cloning it and wrapping it inside a while loop.

local star = game:GetService('ServerStorage').Star -- location of star.

--Cloning item:

while wait(180) do
	local clone = star:Clone()
	clone.Parent = workspace
-- Despawning:
	game.Debris:AddItem(clone, 50) 
end