How do I make a custom hint module and how do I make the hint show to everybody at the same time?

I want to make a better version of the roblox classic, "Hint" class by turning it into an open source module script which will soon contain customisable settings like color, font, animation type, animation speed, etc. And that's my idea of I want it to be in the near future.

Basically, how do I make this serversided or something?

I don't know how to do this in a module script because If I use remote events, it's obviously not going to work, server's never handle GUI's and will fail because of that, so only the client can handle GUI's.

Module located at game.StarterGui

local HintModule = {}

HintModule.Show = function(player, text, delayTime, everyone)
	if everyone == true then
		local guiClone = script:FindFirstChild("ScreenGui"):Clome()
		
		-- help how do I make this clone and show text to everybody at the same time??
	else
		if not player then return end
		
		if player then
			script:FindFirstChild("ScreenGui"):Clone().Parent = player.PlayerGui
			
			player.PlayerGui:FindFirstChild("ScreenGui").Frame.Visible = true
			
			player.PlayerGui:FindFirstChild("ScreenGui").Frame.TextLabel.Text = text
			task.wait(delayTime)
			player.PlayerGui:FindFirstChild("ScreenGui"):Destroy()
		end
	end
end

return HintModule

The script that calls the module is a local script in the same parent as the module script is.

What you need to do is create a server script which will send message to all the clients to show a hint, good reason why you don't do that on client is because an exploiter could send signals to the server and to all other clients which would be no good. When client receives a message to show the hint, he will show it, you can change which client to send the hint to. RemoteEvent.FireAllClients is a function that you can use here, an example:

ServerScriptService.HintSender (Script)

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")

-- You can create the remote event in edit mode in studio
local sendHint = Instance.new("RemoteEvent")
sendHint.Name = "SendHint"
sendHint.Parent = ReplicatedStorage

-- Send a hint to a single player after 5 seconds he joins the game
Players.PlayerAdded:Connect(function(player)
	task.wait(5)
	sendHint:FireClient(player, "Sadly you have joined the game", 5)
end)

-- Sends a hint to all players every 5 seconds
while true do
	task.wait(5)
	sendHint:FireAllClients("Hedreon is noob", 2)
end

StarterGui.HintCreator (LocalScript)

This script will listen to remote event signals from the server and tell HintModule to create hints.

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")

local HintModule = require(script.Parent:WaitForChild("HintModule"))

local localPlayer = Players.LocalPlayer

ReplicatedStorage.SendHint.OnClientEvent:Connect(function(text, delayTime)
	HintModule.Show(Players.LocalPlayer, text, delayTime)
end)

StarterGui.HintModule (ModuleScript)

local HintModule = {}

HintModule.Show = function(player, text, delayTime)
	if not player then return end
	
	-- This if statement is useless since on line earlier you "return" from
	-- the function which stops the function, you can be sure that if
	-- the function continues running then the player exists
	--if player then
	
	-- Instead of repeating player.PlayerGui:FindFirstChild("ScreenGui")
	-- just save the gui into a variable
	local screenGui = script.ScreenGui:Clone()
	screenGui.Frame.Visible = true
	screenGui.Frame.TextLabel.Text = text
	screenGui.Parent = player.PlayerGui

	task.wait(delayTime)
	screenGui:Destroy()
	--end
end

return HintModule