Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Equip this card to a Gemini monster you control as an Equip Card. It gains 700 ATK. When this card is destroyed while equipped and sent to the Graveyard, select 1 face-up Gemini monster and treat it as an Effect Monster.
--デュアル・ブースター
--Gemini Booster
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_EQUIP)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(TIMING_DAMAGE_STEP)
	e1:SetCondition(aux.StatChangeDamageStepCondition)
	e1:SetCost(aux.RemainFieldCost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--Treat 1 Gemini monster as Effect monster
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_LEAVE_FIELD)
	e2:SetCondition(s.dacon)
	e2:SetTarget(s.datg)
	e2:SetOperation(s.daop)
	c:RegisterEffect(e2)
end
s.listed_card_types={TYPE_GEMINI}
function s.filter(c)
	return c:IsFaceup() and c:IsType(TYPE_GEMINI)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_MZONE) and s.filter(chkc) end
	if chk==0 then return e:IsHasType(EFFECT_TYPE_ACTIVATE) and Duel.IsExistingTarget(s.filter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,e:GetHandler(),1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsLocation(LOCATION_SZONE) or not c:IsRelateToEffect(e) or c:IsStatus(STATUS_LEAVE_CONFIRMED) then return end
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() then
		Duel.Equip(tp,c,tc)
		--Gain 700 ATK
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_EQUIP)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(700)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e1)
		--Equip limit
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e2:SetCode(EFFECT_EQUIP_LIMIT)
		e2:SetValue(s.eqlimit)
		e2:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e2)
	else
		c:CancelToGrave(false)
	end
end
function s.eqlimit(e,c)
	return c:GetControler()==e:GetOwnerPlayer() and c:IsType(TYPE_GEMINI)
end
function s.dacon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local ec=c:GetEquipTarget()
	if c:IsReason(REASON_LOST_TARGET) then
		ec=c:GetPreviousEquipTarget()
	end
	return c:IsLocation(LOCATION_GRAVE) and c:IsReason(REASON_DESTROY) and ec~=nil
end
function s.dafilter(c)
	return c:IsFaceup() and c:IsType(TYPE_GEMINI) and not c:IsGeminiStatus()
end
function s.datg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and s.dafilter(chkc) end
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,s.dafilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
end
function s.daop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) and s.dafilter(tc) then
		tc:EnableGeminiStatus()
		tc:RegisterFlagEffect(0,RESET_EVENT|RESETS_STANDARD,EFFECT_FLAG_CLIENT_HINT,1,0,64)
	end
end