Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can send this card from your hand to the Graveyard, then target 1 face-up monster you control; this turn, it can attack all monsters your opponent controls with a Predator Counter, once each. If this face-up card leaves the field: Place 1 Predator Counter on each Special Summoned 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.
--捕食植物スキッド・ドロセーラ
--Predaplant Squid Drosera
local s,id=GetID()
function s.initial_effect(c)
	--attack all
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCondition(s.condition)
	e1:SetCost(Cost.SelfToGrave)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	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_LEAVE_FIELD)
	e2:SetCondition(s.ccon)
	e2:SetOperation(s.cop)
	c:RegisterEffect(e2)
end
s.counter_place_list={COUNTER_PREDATOR}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsAbleToEnterBP()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and chkc:IsFaceup() end
	if chk==0 then return Duel.IsExistingTarget(Card.IsFaceup,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,Card.IsFaceup,tp,LOCATION_MZONE,0,1,1,nil)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_ATTACK_ALL)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		e1:SetValue(s.atkfilter)
		tc:RegisterEffect(e1)
	end
end
function s.atkfilter(e,c)
	return c:GetCounter(COUNTER_PREDATOR)>0
end
function s.ccon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsPreviousPosition(POS_FACEUP) and not c:IsLocation(LOCATION_DECK)
end
function s.cfilter(c)
	return c:IsFaceup() and c:IsSpecialSummoned()
end
function s.cop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local g=Duel.GetMatchingGroup(s.cfilter,tp,0,LOCATION_MZONE,nil)
	local tc=g:GetFirst()
	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