My HungerGUI won't deplete with this LocalScript?

local hungerGui = script.Parent
local player = game.Players.LocalPlayer.Character:FindFirstChild("Humanoid")
maxHunger = Instance.new("IntValue")
maxHunger.Name = "maxHunger"
maxHunger.Value = 300
maxHunger.Parent = game.Players.LocalPlayer
currHunger = Instance.new("IntValue")
currHunger.Name = "currHunger"
currHunger.Value = 300
currHunger.Parent = game.Players.LocalPlayer
minHunger = Instance.new("IntValue")
minHunger.Name = "minHunger"
minHunger.Value = 0
minHunger.Parent = game.Players.LocalPlayer

while true do
    wait(10)
    currHunger.Value = currHunger.Value - 15
    if currHunger.Value > maxHunger then
        currHunger.Value = 300
        print("Fixed Max Health")
    end
    if currHunger.Value <= minHunger then
        player.Health = 0
        print("You've Died From Hunger")
    end
    script.Parent.Percentage.Text = math.floor(game.Players.LocalPlayer.Character:WaitForChild(currHunger))
end