My working bank vault with health wont function?

How do I make it so that my Bank vault's head part un-anchors when the health is on 0. I've had multiple attempts on doing this and still no luck.

This is the explorer:

Workspace> BankVault>Humanoid, script, Head>Smoke, Part, Part, Part, Part, Part

BankVault is a model, Head is a part which has other parts inside of it, there's smoke particles because i made it so that if the health is under half of the original health, there would be smoke particles. "script" is the script I'm trying to make to cause this to function:

local hum = script.Parent.Humanoid
hum.HealthChanged:connect(function(health)
	if hum.Health == 0 then
		game.Workspace.BankVault.Head.Anchored = false
		wait(5)
		game.Workspace.BankVault.Head.Visible = false
	end
end)

Much appreciated if you help :)

-c_omb

According to your code, Head should be a Part but Parts don't have a property named Visible, you should change it to this.

local hum = script.Parent.Humanoid
hum.HealthChanged:Connect(function(health)
    if hum.Health <= 0 then
        game.Workspace.BankVault.Head.Anchored = false
        wait(5)
        game.Workspace.BankVault.Head.Transparency = 1
        game.Workspace.BankVault.Head.CanCollide = false
    end
end)

The code above detects if the Humanoid health is smaller or equals to 0. If it is, unanchors the Head and makes it transparent and be able to walk through.

Edit: connect is deprecated, use Connect instead.