Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can Special Summon this card (from your hand) by Tributing 1 opponent's monster with a Predator Counter. If this card is sent from the field to the GY: Place 1 Predator Counter on each face-up monster your opponent controls, and if you do, any of those monsters that are Level 2 or higher become Level 1 as long as they have a Predator Counter.
--捕食植物バンクシアオーガ
--Predaplant Banksiogre
local s,id=GetID()
function s.initial_effect(c)
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.hspcon)
	e1:SetTarget(s.hsptg)
	e1:SetOperation(s.hspop)
	c:RegisterEffect(e1)
	--counter
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_COUNTER)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetCondition(s.ccon)
	e2:SetOperation(s.cop)
	c:RegisterEffect(e2)
end
s.counter_place_list={COUNTER_PREDATOR}
function s.rfilter(c,tp)
	return c:GetCounter(COUNTER_PREDATOR)>0 and c:IsControler(1-tp)
end
function s.hspcon(e,c)
	if c==nil then return true end
	local tp=e:GetHandlerPlayer()
	return Duel.CheckReleaseGroup(tp,s.rfilter,1,false,1,true,c,tp,nil,true,nil,tp)
end
function s.hsptg(e,tp,eg,ep,ev,re,r,rp,c)
	local g=Duel.SelectReleaseGroup(tp,s.rfilter,1,1,false,true,true,c,nil,nil,true,nil,tp)
	if g then
		g:KeepAlive()
		e:SetLabelObject(g)
	return true
	end
	return false
end
function s.hspop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=e:GetLabelObject()
	if not g then return end
	Duel.Release(g,REASON_COST)
	g:DeleteGroup()
end
function s.ccon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD)
end
function s.cop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local g=Duel.GetMatchingGroup(Card.IsFaceup,tp,0,LOCATION_MZONE,nil)
	for tc in aux.Next(g) do
		tc:AddCounter(COUNTER_PREDATOR,1)
		if tc:GetLevel()>1 then
			local e1=Effect.CreateEffect(c)
			e1:SetType(EFFECT_TYPE_SINGLE)
			e1:SetCode(EFFECT_CHANGE_LEVEL)
			e1:SetReset(RESET_EVENT|RESETS_STANDARD)
			e1:SetCondition(s.lvcon)
			e1:SetValue(1)
			tc:RegisterEffect(e1)
		end
	end
end
function s.lvcon(e)
	return e:GetHandler():GetCounter(COUNTER_PREDATOR)>0
end