Health zombie in BillboardGui on head?

How do I apply a script to a zombie so that when it changes the number of lives it is shown in the BillboardGui above its head? I made them visible, but they are always visible, and I need them to be shown when taking damage --- its my script.

local zombie = script.Parent.Parent.Parent.Zombie

while true do script.Parent.TextLabel.Text = zombie.Health wait() end

The solution is this, I took the script and rewrote it, there were a few errors, but here is the finished script:

local Zombie = script.Parent -- so you need to do it inside of zombie, or put here your path local Hum = Zombie:WaitForChild("Humanoid") -- Humanoid or Zombie, look right local Billboard = Zombie.Head:WaitForChild("BillboardGui") -- the billboard gui with health Billboard.Enabled = false -- disable it for now

Hum:GetPropertyChangedSignal("Health"):Connect(function() -- check health changed Billboard.Enabled = true -- enable gui back Billboard.TextLabel.Text = Hum.Health -- change the Billboard's text to zombie's Hum() end)