While loop isn't executing in my script for some reason?

When Hunger OR Thirst gets to 0 it should start to damage the player When they get to zero it does absolutely nothing.

local player = game:GetService("Players").LocalPlayer
dying = false

if player.Character ~= nil then
	player.Character:WaitForChild("Humanoid").Changed:Connect(function(prop)
		if prop == "Health" then
			player:WaitForChild("Health").Value = player.Character:WaitForChild("Humanoid").Health
		end
	end)
end

if player:WaitForChild("Hunger").Value == 0 or player:WaitForChild("Thirst").Value == 0 then
	dying = true
end

player.Character.Humanoid.Died:Connect(function()
	player:WaitForChild("Hunger").Value = 100
	player:WaitForChild("Thirst").Value = 100
end)


while dying do
	player.Character.Humanoid.Health = player.Character.Humanoid.Health - 15
	wait(1.5)
end

PROBLEM IS SOLVED - To anyone wondering something similar you just need to use it with a changed event.