help

local player = game.Players.LocalPlayer
local exp = player:WaitForChild("leaderstats"):WaitForChild("Exp")
local axp = player:WaitForChild("leaderstats"):WaitForChild("ExpNeeded")

while true do
    wait()
    local expBarSize = (exp.Value/axp.Value) - 0.02
    if exp.Value == 0 then
        expBarSize = 0
        script.Parent:TweenSize(UDim2.new(expBarSize, 0, 0, 20), "Out", "Quad", 0.25)
    else
        script.Parent:TweenSize(UDim2.new(expBarSize, 0, 0, 20), "Out", "Quad", 0.25)
    end
end