Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Until the End Phase, all effects that add or subtract ATK or DEF are reversed. (Additions now subtract, and subtractions now add, instead. Multiplications and divisions, including halving/doubling, are not affected.)
--あまのじゃくの呪い
--Reverse Trap
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:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_REVERSE_UPDATE)
	e1:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e1:SetReset(RESET_PHASE|PHASE_END)
	e1:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
	Duel.RegisterEffect(e1,tp)
end