why is this module script call not working? [simple]

Hi im new in module scripts and im practicing it. I made 2 functions in a module script and, the first one I call works fine, the second one I call doesn't fire at all. I don't know why sinse im calling them just like the first one:

-- Script inside a part:

local Necronomicon = require(game.ServerStorage.Necronomicon)

spawn(Necronomicon.ChangingColorsLoop(script.Parent))
spawn(Necronomicon.HooverLoop(script.Parent))

-- module script called Necronomicon who the script above reffers to:

local module = {}
	-- Changing colors loop using color list module--------------------------
	function module.ChangingColorsLoop(part)
		local colors = require(game.ServerStorage.ColorList) 
		while wait(2) do
			part.BrickColor = colors[math.random(1, #colors)]
		end
	end
	
	
	-- 1x1 hoovering---------------------------------------------------------
	function module.HooverLoop(part) print("not")
		if part:FindFirstChild("BodyAngularVelocity") == nil then
			local bav = Instance.new("BodyAngularVelocity", part)
			local bp = Instance.new("BodyPosition", part)
			bav.AngularVelocity = Vector3.new(0,0.6,0.1)
			bp.D = 2000
			bp.MaxForce = Vector3.new(4000,500,4000)
			bp.P = 10000
			bp.Position = part.Position		
		end
		local direction = "down"
		while wait(1.5) do
			if direction == "down" then
				direction = "up"
				part.BodyPosition.Position = part.BodyPosition.Position - Vector3.new(0,1,0)
			elseif direction == "up" then
				direction = "down"
				part.BodyPosition.Position = part.BodyPosition.Position + Vector3.new(0,1,0)
			end
		end
	end


return module

Nothing showing in output

Solved. Instead of writing:

spawn(Necronomicon.HooverLoop(script.Parent))
spawn(Necronomicon.ChangingColorsLoop(script.Parent))

I should write:

spawn(function() Necronomicon.HooverLoop(script.Parent) end)
spawn(function() Necronomicon.ChangingColorsLoop(script.Parent) end)