How to make a gui appear each time a player joins?

I am trying to make a gui with a text and a button to take it out and i did all the gui steps and when i test play in roblox studio the joining gui appears and works perfectly (the game is locked on first person) but when i join the game in the normal roblox website the joining gui dosent appear and ive tried putting it in lightning and starter gui, i have 2 other guis on startergui one of them a realism mod plugin and one of them a crosshair but they work unlike the joining gui that dosent appear on normal roblox, any help? and if i need a remote thing, please tell me the remote scripts and where to put the remote events.

Hi I may have an answer for your question. You can use remote events. Read this article. I suggest you do server-all clients if you want everyone to see the Gui. https://developer.roblox.com/en-us/articles/Remote-Functions-and-Events

You should also use the playeradded event so whenever the player joins the gui pops up.

https://developer.roblox.com/en-us/api-reference/event/Players/PlayerAdded

hope these links will help you!

There is another more simple way to this.

step 1. make a screen gui and add a frame step 2. insert this code in a normal script in workspace

local gui = game.StarterGui.ScreenGui.Frame
gui.Visible = false
local Players = game:GetService("Players")

Players.PlayerAdded:Connect(function(player)
	print(player.Name .. " joined the game!")
	gui.Visible = true
end)

Players.PlayerRemoving:Connect(function(player)
	print(player.Name .. " left the game!")
	gui.Visible = false
end)

hope this helps