Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Select 2 face-up Attack Position monsters on the field. When any of the selected monsters are removed from the field, destroy this card. When this card is destroyed, destroy the selected monster(s).
--グレイモヤ不発弾
--Widespread Dud
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:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetTarget(s.target)
	c:RegisterEffect(e1)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCode(EVENT_CHAIN_SOLVED)
	e2:SetLabelObject(e1)
	e2:SetCondition(aux.PersistentTgCon)
	e2:SetOperation(s.tgop)
	c:RegisterEffect(e2)
	--Destroy1
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e3:SetCode(EVENT_LEAVE_FIELD)
	e3:SetCondition(s.descon1)
	e3:SetOperation(s.desop1)
	c:RegisterEffect(e3)
	--Destroy2
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e4:SetRange(LOCATION_SZONE)
	e4:SetCode(EVENT_LEAVE_FIELD)
	e4:SetCondition(s.descon2)
	e4:SetOperation(s.desop2)
	c:RegisterEffect(e4)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsPosition(POS_FACEUP_ATTACK) end
	if chk==0 then return Duel.IsExistingTarget(Card.IsPosition,tp,LOCATION_MZONE,LOCATION_MZONE,2,nil,POS_FACEUP_ATTACK) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUPATTACK)
	Duel.SelectTarget(tp,Card.IsPosition,tp,LOCATION_MZONE,LOCATION_MZONE,2,2,nil,POS_FACEUP_ATTACK)
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(re) then return end
	local g=Duel.GetChainInfo(ev,CHAININFO_TARGET_CARDS):Filter(Card.IsRelateToEffect,nil,re)
	local tc=g:GetFirst()
	for tc in aux.Next(g) do
		c:SetCardTarget(tc)
	end
end
function s.descon1(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsReason(REASON_DESTROY)
end
function s.desop1(e,tp,eg,ep,ev,re,r,rp)
	local g=e:GetHandler():GetCardTarget():Filter(Card.IsLocation,nil,LOCATION_MZONE)
	Duel.Destroy(g,REASON_EFFECT)
end
function s.descon2(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:GetCardTargetCount()==0 then return false end
	local g=c:GetCardTarget()
	local tc1=g:GetFirst()
	local tc2=g:GetNext()
	return eg:IsContains(tc1) or (tc2 and eg:IsContains(tc2))
end
function s.desop2(e,tp,eg,ep,ev,re,r,rp)
	Duel.Destroy(e:GetHandler(),REASON_EFFECT)
end