Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If a monster(s) is Normal or Special Summoned face-up, except by the effect of "Black Garden": Halve its ATK, then, the controller of that monster Special Summons 1 "Rose Token" (Plant/DARK/Level 2/ATK 800/DEF 800) to their opponent's field in Attack Position. (This ATK loss remains even if this card leaves the field.) You can target 1 monster in your GY with ATK equal to the total ATK of all Plant monsters on the field; destroy this card and as many Plant monsters on the field as possible, then, if you destroyed all of them, Special Summon that targeted monster.
--ブラック・ガーデン
--Black Garden
local SUMMONED_BY_BLACK_GARDEN=0x20
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_ACTIVATE)
	e0:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e0)
	--Halve the ATK of a Summoned monster, then, its controller Special Summons 1 "Rose Token" to their opponent's field in Attack Position
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE+CATEGORY_SPECIAL_SUMMON+CATEGORY_TOKEN)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e1:SetRange(LOCATION_FZONE)
	e1:SetCode(EVENT_CUSTOM+id)
	e1:SetTarget(s.atksptg)
	e1:SetOperation(s.atkspop)
	c:RegisterEffect(e1)
	--Destroy this card and as many Plant monsters as possible, then Special Summon 1 monster in your GY with ATK equal to the total ATK of all Plant monsters
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_DESTROY+CATEGORY_SPECIAL_SUMMON)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_FZONE)
	e2:SetTarget(s.dessptg)
	e2:SetOperation(s.desspop)
	c:RegisterEffect(e2)
	aux.GlobalCheck(s,function()
		local ge1=Effect.CreateEffect(c)
		ge1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		ge1:SetCode(EVENT_SUMMON_SUCCESS)
		ge1:SetCondition(s.regcon)
		ge1:SetOperation(s.regop)
		Duel.RegisterEffect(ge1,0)
		local ge2=ge1:Clone()
		ge2:SetCode(EVENT_SPSUMMON_SUCCESS)
		Duel.RegisterEffect(ge2,0)
	end)
end
s.listed_names={id,TOKEN_ROSE}
function s.cfilter(c,tp)
	return c:IsControler(tp) and c:GetSummonType()~=SUMMON_TYPE_SPECIAL+SUMMONED_BY_BLACK_GARDEN
end
function s.regcon(e,tp,eg,ep,ev,re,r,rp)
	local sf=0
	if eg:IsExists(s.cfilter,1,nil,0) then
		sf=sf+1
	end
	if eg:IsExists(s.cfilter,1,nil,1) then
		sf=sf+2
	end
	e:SetLabel(sf)
	return sf~=0
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	Duel.RaiseEvent(eg,EVENT_CUSTOM+id,e,r,rp,ep,e:GetLabel())
end
function s.atksptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsRelateToEffect(e) end
	Duel.SetTargetCard(eg)
	Duel.SetOperationInfo(0,CATEGORY_TOKEN,nil,1,0,0)
	local p
	if bit.extract(ev,tp)~=0 and bit.extract(ev,1-tp)~=0 then
		p=PLAYER_ALL
	elseif bit.extract(ev,tp)~=0 then
		p=tp
	else
		p=1-tp
	end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,p,0)
end
function s.atkfilter(c,e)
	return c:IsLocation(LOCATION_MZONE) and c:IsFaceup() and c:IsRelateToEffect(e) and not c:IsImmuneToEffect(e)
end
function s.atkspop(e,tp,eg,ep,ev,re,r,rp)
	local g=eg:Filter(s.atkfilter,nil,e)
	if #g==0 then return end
	local change=false
	for tc in g:Iter() do
		local preatk=tc:GetAttack()
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetValue(math.ceil(tc:GetAttack()/2))
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1)
		if not tc:IsImmuneToEffect(e1) and math.ceil(preatk/2)==tc:GetAttack() then
			change=true
		end
	end
	if not change then return end
	if bit.extract(ev,tp)~=0 and Duel.GetLocationCount(1-tp,LOCATION_MZONE)>0
		and Duel.IsPlayerCanSpecialSummonMonster(tp,TOKEN_ROSE,SET_ROSE,TYPES_TOKEN,800,800,2,RACE_PLANT,ATTRIBUTE_DARK,POS_FACEUP_ATTACK,1-tp) then
		local token=Duel.CreateToken(tp,TOKEN_ROSE)
		Duel.SpecialSummonStep(token,SUMMONED_BY_BLACK_GARDEN,tp,1-tp,false,false,POS_FACEUP_ATTACK)
	end
	if bit.extract(ev,1-tp)~=0 and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsPlayerCanSpecialSummonMonster(1-tp,TOKEN_ROSE,SET_ROSE,TYPES_TOKEN,800,800,2,RACE_PLANT,ATTRIBUTE_DARK,POS_FACEUP_ATTACK,tp) then
		local token=Duel.CreateToken(1-tp,TOKEN_ROSE)
		Duel.SpecialSummonStep(token,SUMMONED_BY_BLACK_GARDEN,1-tp,tp,false,false,POS_FACEUP_ATTACK)
	end
	Duel.SpecialSummonComplete()
end
function s.spfilter(c,atk,e,tp)
	return c:IsAttack(atk) and c:IsCanBeSpecialSummoned(e,SUMMONED_BY_BLACK_GARDEN,tp,false,false)
end
function s.dessptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.spfilter(chkc,e:GetLabel(),e,tp) end
	local g=Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsRace,RACE_PLANT),tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	local atk=g:GetSum(Card.GetAttack)
	if chk==0 then return #g>0 and Duel.GetMZoneCount(tp,g)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,atk,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local tg=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,1,nil,atk,e,tp)
	e:SetLabel(atk)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,tg,1,0,0)
	g:AddCard(e:GetHandler())
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,0,0)
end
function s.desspop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	local dg=Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsRace,RACE_PLANT),tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	dg:AddCard(c)
	Duel.Destroy(dg,REASON_EFFECT)
	local og=Duel.GetOperatedGroup()
	if #dg~=#og then return end
	local ct=0
	for oc in og:Iter() do
		if dg:IsContains(oc) then ct=ct+1 end
	end
	if ct~=#og then return end
	Duel.BreakEffect()
	og:RemoveCard(c)
	local atk=og:GetSum(Card.GetPreviousAttackOnField)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,SUMMONED_BY_BLACK_GARDEN,tp,tp,false,false,POS_FACEUP)
	end
end