Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If a monster on your side of the field was sent to your Graveyard this turn, you can Special Summon 1 monster with an ATK of 1500 points or less from your Deck once during this turn. Then shuffle your Deck.
--遺言状
--Last Will
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)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	aux.GlobalCheck(s,function()
		local ge1=Effect.CreateEffect(c)
		ge1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		ge1:SetCode(EVENT_TO_GRAVE)
		ge1:SetOperation(s.checkop)
		Duel.RegisterEffect(ge1,0)
	end)
end
function s.cfilter(c,tp)
	return c:IsControler(tp) and c:IsPreviousControler(tp) and c:IsPreviousLocation(LOCATION_MZONE)
end
function s.checkop(e,tp,eg,ep,ev,re,r,rp)
	for p=0,1 do
		if eg:IsExists(s.cfilter,1,nil,p) then
			Duel.RegisterFlagEffect(p,id,RESET_PHASE|PHASE_END,0,1)
		end
	end
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	if Duel.GetFlagEffect(tp,id)~=0 then
		e:SetCategory(CATEGORY_SPECIAL_SUMMON)
		Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
		e:SetLabel(1)
	else
		e:SetCategory(0)
		e:SetLabel(0)
	end
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if e:GetLabel()==1
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_DECK,0,1,nil,e,tp)
		and Duel.SelectYesNo(tp,aux.Stringid(id,0)) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_DECK,0,1,1,nil,e,tp)
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	else
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		e1:SetCode(EVENT_FREE_CHAIN)
		e1:SetCountLimit(1)
		e1:SetCondition(s.spcon)
		e1:SetOperation(s.spop)
		e1:SetReset(RESET_PHASE|PHASE_END)
		Duel.RegisterEffect(e1,tp)
	end
end
function s.spfilter(c,e,tp)
	return c:IsAttackBelow(1500) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetFlagEffect(tp,id)~=0
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_DECK,0,1,nil,e,tp)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_CARD,0,id)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_DECK,0,1,1,nil,e,tp)
	Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
end