Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 Synchro Monster you control; return it to the Extra Deck, and if you do, destroy all face-up monsters your opponent controls with ATK less than or equal to that Synchro Monster's original ATK.
--シンクロ・クラッカー
--Synchro Cracker
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_TODECK+CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.filter(c,tp)
	return c:IsFaceup() and c:IsType(TYPE_SYNCHRO) and c:IsAbleToExtra()
		and Duel.IsExistingMatchingCard(s.desfilter,tp,0,LOCATION_MZONE,1,nil,math.max(0,c:GetTextAttack()))
end
function s.desfilter(c,atk)
	return c:IsFaceup() and c:IsAttackBelow(atk)
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 s.filter(chkc,tp) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_MZONE,0,1,nil,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TODECK)
	local g1=Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil,tp)
	local g2=Duel.GetMatchingGroup(s.desfilter,tp,0,LOCATION_MZONE,nil,math.max(0,g1:GetFirst():GetTextAttack()))
	Duel.SetOperationInfo(0,CATEGORY_TODECK,g1,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g2,#g2,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	local atk=tc:GetTextAttack()
	if atk<0 then atk=0 end
	if tc:IsRelateToEffect(e) and Duel.SendtoDeck(tc,nil,SEQ_DECKSHUFFLE,REASON_EFFECT)~=0 and tc:IsLocation(LOCATION_EXTRA) then
		local g=Duel.GetMatchingGroup(s.desfilter,tp,0,LOCATION_MZONE,nil,atk)
		Duel.Destroy(g,REASON_EFFECT)
	end
end