attempt to index local 'humanoid' (a nil value) ???

attempt to index local 'humanoid' (a nil value)

local removeHealth = false

script.Parent.Touched:connect(function(otherPart)
	local character = otherPart.Parent
	local humanoid = character:FindFirstChild("Humanoid")
	
	if humanoid then
		removeHealth = true
	end
	
	while removeHealth == true do
		wait(1)
		local CurrentHealth = humanoid.Health
		local HealthToRemove = 12
		
		CurrentHealth = CurrentHealth.Value - HealthToRemove
	end
	
	script.Parent.TouchEnded:connect(function(otherPart)
		if humanoid then
			removeHealth = false
		end
	end)
end)

Any help?