Why won't this run?

Help and Feedback Scripting Support
#1

Hello, I have a while true do in a script but it won’t run for some reason.
Also might be an issue with the coroutine. Here is my code:

local frame = script.Parent

local Player = game:GetService("Players").LocalPlayer
Player.CharacterAdded:Wait()
local char = Player.Character

local MaxOxy = 300
local CurrentOxy = 300

local oxyDrain = coroutine.create(function()
		task.wait(0.)
		CurrentOxy -= 1
		print(CurrentOxy)
end)


while true do
	task.wait()
	coroutine.resume(oxyDrain)
	frame.Size.X.Offset = CurrentOxy
	if CurrentOxy < 1 then
		char.Humanoid.Health = 0
		Player:Kick("bruh u didn't breath lol")
	end
end
#2

Its prolly Player.CharacterAdded:Wait()

do:

local char = Player.Character or Player.CharacterAdded:Wait()