This script wont work. What did I do wrong?

It's where if the part is transparent, it does no damage, but if it's opaque, it kills you instantly. I don't know what I did wrong.

while true do
	wait(10)
	script.Parent.Transparency = 1
	wait(10)
	script.Parent.Transparency = 0
	



function onTouched (part)
	if part.Transparency == 0 then
              local h = script.Parent.Parent:findFirstChild ("Humanoid")
              h.Health = 0
              end
end
end
script.Parent.Touched:connect(onTouched)

This should work:

script.Parent.Touched:connect(function(hit)
	humanoid = hit.Parent:findFirstChild("Humanoid")
	if(humanoid ~= nil and script.Parent.Transparency == 0) then
		humanoid.Health = 0
	end
end)

What I am doing is checking if a Humanoid exists and that the part is not transparent, if so, kill the player who touched the block, if not, do nothing.