Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
FLIP: Place 1 A-Counter on 1 face-up monster on your opponent's side of the field. (If a monster with an A-Counter battles an "Alien" monster, it loses 300 ATK and DEF for each A-Counter during damage calculation only.) After this card has been flipped face-up, when it is destroyed by battle and sent to the Graveyard, draw 1 card.
--エーリアン・グレイ
--Alien Grey
local s,id=GetID()
function s.initial_effect(c)
	--flip
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_COUNTER)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_FLIP)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--draw
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EVENT_FLIP)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e2:SetOperation(s.flop)
	c:RegisterEffect(e2)
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_DRAW)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e3:SetCode(EVENT_BATTLE_DESTROYED)
	e3:SetCondition(s.drcon)
	e3:SetTarget(s.drtg)
	e3:SetOperation(s.drop)
	c:RegisterEffect(e3)
	--atk def
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD)
	e4:SetCode(EFFECT_UPDATE_ATTACK)
	e4:SetRange(LOCATION_MZONE)
	e4:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
	e4:SetCondition(s.adcon)
	e4:SetTarget(s.adtg)
	e4:SetValue(s.adval)
	c:RegisterEffect(e4)
	local e5=e4:Clone()
	e5:SetCode(EFFECT_UPDATE_DEFENSE)
	c:RegisterEffect(e5)
end
s.listed_series={SET_ALIEN}
s.counter_place_list={COUNTER_A}
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and chkc:IsFaceup() end
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	local g=Duel.SelectTarget(tp,Card.IsFaceup,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_COUNTER,g,1,COUNTER_A,1)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsFaceup() and tc:IsRelateToEffect(e) then
		tc:AddCounter(COUNTER_A,1)
	end
end
function s.flop(e,tp,eg,ep,ev,re,r,rp)
	e:GetHandler():RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD_EXC_GRAVE,0,0)
end
function s.drcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsLocation(LOCATION_GRAVE) and e:GetHandler():IsReason(REASON_BATTLE)
		and e:GetHandler():GetFlagEffect(id)~=0
end
function s.drtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(1)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,1)
end
function s.drop(e,tp,eg,ep,ev,re,r,rp)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Draw(p,d,REASON_EFFECT)
end
function s.adcon(e)
	return Duel.IsPhase(PHASE_DAMAGE_CAL) and Duel.GetAttackTarget()
end
function s.adtg(e,c)
	local bc=c:GetBattleTarget()
	return bc and c:GetCounter(COUNTER_A)~=0 and bc:IsSetCard(SET_ALIEN)
end
function s.adval(e,c)
	return c:GetCounter(COUNTER_A)*-300
end