Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Send this card to the Graveyard during your opponent's 3rd End Phase after activation. WATER monsters you control cannot be destroyed by your opponent's card effects.
--水神の護符
--Sea Lord's Amulet
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	c:RegisterEffect(e1)
	--indes
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(aux.TargetBoolFunction(Card.IsAttribute,ATTRIBUTE_WATER))
	e2:SetValue(s.indval)
	c:RegisterEffect(e2)
end
function s.indval(e,re,tp)
	return e:GetHandlerPlayer()==1-tp
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	e:GetHandler():SetTurnCounter(0)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_SZONE)
	e1:SetCondition(s.tgcon)
	e1:SetOperation(s.tgop)
	e1:SetReset(RESETS_STANDARD_PHASE_END|RESET_OPPO_TURN,3)
	e:GetHandler():RegisterEffect(e1)
end
function s.tgcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsTurnPlayer(1-tp)
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local ct=c:GetTurnCounter()
	ct=ct+1
	c:SetTurnCounter(ct)
	if ct==3 then
		Duel.SendtoGrave(c,REASON_RULE)
	end
end