Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Equip only to a Spellcaster monster. It gains ATK equal to its Level x 100. If the equipped monster is destroyed by your opponent's card and sent to the GY, and this card is sent to your GY as a result: You can Special Summon that monster. * The above text is unofficial and describes the card's functionality in the OCG.
--バウンド・ワンド
--Bound Wand
local s,id=GetID()
function s.initial_effect(c)
	aux.AddEquipProcedure(c,nil,aux.FilterBoolFunction(Card.IsRace,RACE_SPELLCASTER))
	--Atk up
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_EQUIP)
	e2:SetCode(EFFECT_UPDATE_ATTACK)
	e2:SetValue(s.atkval)
	c:RegisterEffect(e2)
	--spsummon
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,0))
	e4:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e4:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e4:SetCode(EVENT_TO_GRAVE)
	e4:SetCondition(s.spcon)
	e4:SetTarget(s.sptg)
	e4:SetOperation(s.spop)
	c:RegisterEffect(e4)
end
function s.atkval(e,c)
	return c:GetLevel()*100
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	local ec=e:GetHandler():GetPreviousEquipTarget()
	return e:GetHandler():IsReason(REASON_LOST_TARGET) and ec and ec:IsReason(REASON_DESTROY)
		and ec:IsLocation(LOCATION_GRAVE) and ec:GetReasonPlayer()==1-tp
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local ec=e:GetHandler():GetPreviousEquipTarget()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and ec:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetTargetCard(ec)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,ec,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
	end
end