LevelGuiScript

local Player = game.Players.LocalPlayer

local exp = Player.leaderstats.Exp
local requiredexp = Player.RequiredExp

exp.Changed:Connect(function(Changed)
    if Changed then
        script.Parent.ExpBar:TweenSize(UDim2.new(exp.Value/requiredexp.Value,0,1,0))
    end
end)

while wait() do
    script.Parent.ExpLabel.Text = exp.Value.."/"..requiredexp.Value
end