Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
All Synchro Monsters on the field are changed to Defense Position. And then, return all face-up Synchro Monsters to the Extra Deck during the End Phase.
--妨害電波
--Intercept Wave
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.filter(c)
	return c:IsPosition(POS_FACEUP_ATTACK) and c:IsType(TYPE_SYNCHRO) and c:IsCanChangePosition()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,#g,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	if #g>0 and Duel.ChangePosition(g,POS_FACEUP_DEFENSE)~=0 then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		e1:SetCode(EVENT_PHASE+PHASE_END)
		e1:SetCountLimit(1)
		e1:SetReset(RESET_PHASE|PHASE_END)
		e1:SetCondition(s.tdcon)
		e1:SetOperation(s.tdop)
		Duel.RegisterEffect(e1,tp)
	end
end
function s.tdfilter(c)
	return c:IsFaceup() and c:IsType(TYPE_SYNCHRO) and c:IsAbleToExtra()
end
function s.tdcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.tdfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil)
end
function s.tdop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.tdfilter,tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	Duel.SendtoDeck(g,nil,SEQ_DECKTOP,REASON_EFFECT)
end