Has joined the game script

local Players = game:GetService("Players")

function onPlayerAdded(player)
    script.Parent.Text = player.Name .. " has joined the game "
    wait(2)
    script.Parent:TweenPosition(UDim2.new(0,0,0.5,0))
    wait(4)
    script.Parent:TweenPosition(UDim2.new(0,-500,0.5,0))
end

Players.PlayerAdded:connect(onPlayerAdded)

for _,player in pairs(Players:GetPlayers()) do
     onPlayerAdded(player)
end