Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Activate this card by targeting 1 "@Ignister" monster you control. That monster gains 800 ATK, also all monsters your opponent controls must attack that monster you control, if able. If this face-up card in its owner's Spell & Trap Zone has left the field because of an opponent's effect, and is now in the GY or banished: Draw 1 card. You can only use this effect of "A.I. Shadow" once per turn.
--Aiシャドー
--A.I. Shadow
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	aux.AddPersistentProcedure(c,0,aux.FaceupFilter(Card.IsSetCard,SET_IGNISTER),CATEGORY_ATKCHANGE,EFFECT_FLAG_DAMAGE_STEP,TIMING_DAMAGE_STEP,TIMING_DAMAGE_STEP,aux.StatChangeDamageStepCondition)
	--atk up
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetRange(LOCATION_SZONE)
	e1:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
	e1:SetTarget(aux.PersistentTargetFilter)
	e1:SetValue(800)
	c:RegisterEffect(e1)
	--must attack
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_MUST_ATTACK)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(0,LOCATION_MZONE)
	e2:SetCondition(s.atkcon)
	c:RegisterEffect(e2)
	local e3=e2:Clone()
	e3:SetCode(EFFECT_MUST_ATTACK_MONSTER)
	e3:SetValue(aux.PersistentTargetFilter)
	c:RegisterEffect(e3)
	--draw
	local e4=Effect.CreateEffect(c)
	e4:SetCategory(CATEGORY_DRAW)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e4:SetCode(EVENT_TO_GRAVE)
	e4:SetProperty(EFFECT_FLAG_DELAY)
	e4:SetCountLimit(1,id)
	e4:SetCondition(s.drcon)
	e4:SetTarget(s.drtg)
	e4:SetOperation(s.drop)
	c:RegisterEffect(e4)
	local e5=e4:Clone()
	e5:SetCode(EVENT_REMOVE)
	c:RegisterEffect(e5)
end
s.listed_series={SET_IGNISTER}
function s.atkcon(e)
	return Duel.GetTurnPlayer()~=e:GetHandlerPlayer() and e:GetHandler():GetCardTargetCount()>0
end
function s.drcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsReason(REASON_EFFECT) and rp~=tp and c:GetPreviousControler()==tp
		and c:IsPreviousLocation(LOCATION_ONFIELD) and c:IsPreviousPosition(POS_FACEUP)
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