How can i make a working health bar(number)?

Hello, this is easy, i made a script but i see nothing wrong with it, but i dont see the textlabel changing text :(

StarterGui(folder) Health(ScreenGui) health(TextLabel) healthcheck(normal Script)

the healthcheck script:

while true do
	script.Parent.Text = script.Parent.Parent.Parent.Parent.Character.Humanoid.Health
	wait(1)
end

why this no work? parent of that is health, perent of that is Health, parent of that is StarterGui, last .Parent is Parent of StarterGui, which when playing, is the Player, then Character is its character then humnaoid then health, i see no errors, but why doesnt it set the variable when i damage myself by touching a testbrick i made that takes away 50 health? the health take away thing works, for the default health bar, but the number for textlabel doesnt show health! By the way right now im more focused on number and i dont care about rounding it to a whole number... please help

Local Script within StarterGui

local player = game.Players.LocalPlayer

while true do
	if player.Character ~= nil and player.Character:FindFirstChild("Humanoid") ~= nil then
		script.Parent.Text = player.Character.Humanoid.Health
	end
	wait(1)
end

The main issue with the script is that there is no wait time and since the player character doesn't load at the same time as the server, then there is no character or humanoid to check the health of.

Within the loop, you can check if there is a character and humanoid before causing the change in the textlabel as shown above.