so my antigod script is not working please help?

You seem to be missing an end at the end. Also, you might want to do a check every few seconds like this:

while true do
wait (1)
if game.Players.LocalPlayer.Character.Humanoid.MaxHealth = math.huge 
then
game.Players.LocalPlayer.Character.Humanoid.MaxHealth = 0
else game.Players.LocalPlayer.Character.Humanoid.MaxHealth = 100
end

if game.Players.LocalPlayer.Character.Humanoid.Health = math.huge
then game.Players.LocalPlayer.Character.Humanoid.Health = 0
else game.Players.LocalPlayer.Character.Humanoid.Health = 100
end
end

I used variables to shorten it also, I would recommend using WaitForChild to get Humanoid and CharacterAdded:wait() to get character.

EDIT: Added a loop

plr = game.Players.LocalPlayer
char = plr.CharacterAdded:wait()
human = char:WaitForChild('Humanoid') -- Waits for Humanoid so it's detected
while wait(5) do  -- every 5 seconds, it checks for the health.
if human.MaxHealth == math.huge then -- It's best to use MaxHealth since the health can't be more than MaxHealth.
human.MaxHealth = 0 -- sets max health to zero if maxhealth = math.huge
human.Health = 0 -- sets health to zero if health = math.huge
else
human.MaxHealth = 100
human.Health = 100
end