How do i change _G to module form in my code?

i'm back again, with the same question sorta, but how do i make my code into a modulescript form, i'm reading about modulescripts but its not helping because no one is providing a example with my code and not codes that are saying "HI" in a input.

I dont know were to start, where do i put what?, because i have a feeling whats causing my game to break is these garbage _G functions, and i need to eliminate those as soon as possible.

So if you would be kind enough to provide, a sample of what i should do with my code i am about to show you.

function getRandomMode()
	local gameModes = {_G.eliminationRound, _G.teamSwapRound, _G.controllerRound,}
	local randomSlot = math.random(1, #gameModes)
	local randomMode = gameModes[randomSlot]
	roundType = gameModeNames[randomSlot]
	_G.announce("Round chosen: "..gameModeNames[randomSlot], Color3.new(0, 0, 0), 2)
	wait(1)
	local description = descriptions[randomSlot]
	for index, text in pairs(description) do
		_G.announce(text, Color3.new(0, 0, 0), 2)
		wait(1)
	end
	return randomMode
end

function getRandomMap()
	local gameMaps = game.Lighting.Maps:GetChildren()
	local randomMap = gameMaps[math.random(1, #gameMaps)]
	_G.announce("Map chosen: "..randomMap.Name, Color3.new(0, 0, 0), 2)
	return randomMap
end

function getRandomSpawn(teamColor)
	if (workspace:findFirstChild("Map")) then
		local spawns = {}
		if (teamColor == game.Teams.Red.TeamColor) then
			spawns = workspace.Map.Red:GetChildren()
		else
			spawns = workspace.Map.Blue:GetChildren()
		end
		local spawn = spawns[math.random(1, #spawns)]
		return spawn
	end
	return nil
end

Exactly how do i eliminate these _G functions on my code, thank you for helping.

I will not be using your code at all in my example, however it should be similar enough to where you can understand.

_G is a shared table, and still only a table. As you've been previously informed, the better alternative, is using modules.

Modules can contain and return a table, so the simplest conversion is to store all of your methods and so on inside of a table which is returned

You currently have code somewhere that might look like this:

_G.Print = function(str)
	print("SERVER: "..str)
end

or maybe

_G.gamestate = "active"

You can maintain the same way of defining them, the only difference, is you will do it in a ModuleScript, and you will create those variables and methods as apart of the table in the module, and not the _G table.

Example:

local module = {}

module.Print = function(str)
	print("SERVER: "..str)
end)

module.gamestate = "active"

return module

Some other script:

local module = require(script.Module)
--replace script.Module with the path to the ModuleScript above

module.Print(module.gamestate) --> SERVER: active