Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 monsters If this card is Link Summoned using 2 DARK monsters with different names as material, it gains this effect. ● You can Tribute 1 monster, then target 1 face-up card on the field; place 1 Patrol Counter on it. You can only use this effect of "Beat Cop from the Underworld" once per turn. (If a card with a Patrol Counter would be destroyed by battle or card effect, remove 1 Patrol Counter from it instead.)
--魔界の警邏課デスポリス
--Beat Cop from the Underworld
--Scripted by ahtelel
local s,id=GetID()
function s.initial_effect(c)
	--link summon
	c:EnableReviveLimit()
	Link.AddProcedure(c,nil,2,2)
	--effect gain
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_MATERIAL_CHECK)
	e1:SetValue(s.matcheck)
	c:RegisterEffect(e1)
end
s.counter_place_list={0x1049}
function s.matcheck(e,c)
	local g=c:GetMaterial()
	if #g==2 and g:GetClassCount(Card.GetCode)==#g and not g:IsExists(aux.NOT(Card.IsAttribute),1,nil,ATTRIBUTE_DARK) then
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(aux.Stringid(id,0))
		e1:SetCategory(CATEGORY_COUNTER)
		e1:SetType(EFFECT_TYPE_IGNITION)
		e1:SetCountLimit(1,id)
		e1:SetRange(LOCATION_MZONE)
		e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
		e1:SetCost(s.addcost)
		e1:SetTarget(s.addtg)
		e1:SetOperation(s.addop)
		e1:SetReset(RESET_EVENT|(RESETS_STANDARD&~RESET_TOFIELD))
		c:RegisterEffect(e1)
	end
end
function s.cfilter(c)
	return Duel.IsExistingTarget(Card.IsCanAddCounter,0,LOCATION_ONFIELD,LOCATION_ONFIELD,1,c,0x1049,1)
end
function s.addcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckReleaseGroupCost(tp,s.cfilter,1,false,nil,nil) end
	local g=Duel.SelectReleaseGroupCost(tp,s.cfilter,1,1,false,nil,nil)
	Duel.Release(g,REASON_COST)
end
function s.addtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsOnField() and chkc:IsFaceup() end
	if chk==0 then return Duel.IsExistingTarget(Card.IsFaceup,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_COUNTER)
	Duel.SelectTarget(tp,Card.IsFaceup,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,1,nil)
end
function s.addop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) then
		tc:AddCounter(0x1049,1)
		if tc:GetFlagEffect(id)~=0 then return end
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
		e1:SetCode(EFFECT_DESTROY_REPLACE)
		e1:SetTarget(s.reptg)
		e1:SetOperation(s.repop)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1)
		tc:RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD,0,0)
	end
end
function s.reptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return not e:GetHandler():IsReason(REASON_REPLACE+REASON_RULE) and e:GetHandler():GetCounter(0x1049)>0 end
	return true
end
function s.repop(e,tp,eg,ep,ev,re,r,rp,chk)
	e:GetHandler():RemoveCounter(tp,0x1049,1,REASON_EFFECT)
end