MessageMaker

game.ReplicatedStorage.PlayerJoinedRE.OnClientEvent:Connect(function(plrName)

    game.StarterGui:SetCore("ChatMakeSystemMessage", {
        Text = plrName .. " has joined!",
        Color = Color3.fromRGB(255, 115, 0),
        Font = Enum.Font.SourceSansBold,
        TextSize = 18,
    })
end)