What is wrong with my Exp Bar script?

I've got this Exp bar script that I've been working on, but it simply doesn't work. No error in the output or anything, it just doesn't run. It is in a Local Script, and I know that the Hierarchy is right as well. What is wrong here?

wait(2)

local xps = {0, 3, 6, 10, 15, 20, 25, 30, 40, 50,
    65, 80, 95, 110, 125, 140, 155, 180, 210,
    250, 300, 350, 400, 450, 500, 575, 650, 725,
    825, 1000};

function hudsize()
    local Player = game.Players.LocalPlayer
	local level = Player.leaderstats.Level.Value
	local ExpBar = script.Parent.ExpBar
    local xp = Player.Exp.Value
	local level = Player.leaderstats.Level.Value
    for level = 1, #xps do
 
		local required = ((xps[level] * 100)/xp)
		wait(.1)
		local size = (required * 200)
		wait(.1)
		ExpBar.Size = UDim2.new(0,15,0,size)
		print(Player.Name.."'s ExpBar Size is "..size)
			
		end
	end

game.Players.PlayerAdded:connect(hudsize)
game.Players.LocalPlayer.Exp.Changed:connect(hudsize)

PlayerAdded doesn't fire for LocalScripts, for some reason. Just use ChildAdded instead (and if needed, check that new children actually are Player instances)

Most likely that is your problem.