How can i make the health of the player slowly drain via a for loop?

i am trying to make a brick that when clicked will slowly drain your health. the code goes as follows:

script.Parent.MouseClick:Connect(function(plr)
	local h = plr.Character.Humanoid
	for i = 100, 0, 1 do
		h.Health = i
	end
end)

it should work fine from what i understand, but whenever i click on the brick nothing happens. I'm pretty sure that it doesnt have anything to do with the variables because whenever i type:

script.Parent.MouseClick:Connect(function(plr)
	local h = plr.Character.Humanoid
		h.Health = 0
end)

it works, so the variables arent the problem.

Help would be appreciated

You need to add a clickDetector to your part. You also will want to edit your for loop

script.Parent.ClickDetector.MouseClick:Connect(function(plr)
	  local h = plr.Character.Humanoid
	  for i = 100, 0, -1 do
	        h.Health = i
	  end
end)

This should fix your program