Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 face-up Attack Position "Elemental HERO Bubbleman" you control and 1 face-up Attack Position monster your opponent controls; change both those targets to Defense Position, then Tribute that "Elemental HERO Bubbleman", then Special Summon 1 "Elemental HERO" monster from your hand.
--バブル・シャッフル
--Bubble Shuffle
local s,id=GetID()
function s.initial_effect(c)
	--Tribute "Elemental HERO Bubbleman", then special summon 1 "Elemental HERO" monster from hand
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION+CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.postg)
	e1:SetOperation(s.posop)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E)
	c:RegisterEffect(e1)
end
s.listed_series={SET_ELEMENTAL_HERO}
s.listed_names={79979666}
function s.filter1(c,ft)
	return c:IsPosition(POS_FACEUP_ATTACK) and c:IsCanChangePosition() and c:IsCode(79979666) 
		and (ft>0 or c:GetSequence()<5)
end
function s.filter2(c)
	return c:IsPosition(POS_FACEUP_ATTACK) and c:IsCanChangePosition()
end
function s.spfilter(c,e,tp)
	return c:IsSetCard(SET_ELEMENTAL_HERO) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	local ft=Duel.GetLocationCount(tp,LOCATION_MZONE)
	if chk==0 then return ft>-1 and Duel.IsExistingTarget(s.filter1,tp,LOCATION_MZONE,0,1,nil,ft)
		and Duel.IsExistingTarget(s.filter2,tp,0,LOCATION_MZONE,1,nil)
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_POSCHANGE)
	local g1=Duel.SelectTarget(tp,s.filter1,tp,LOCATION_MZONE,0,1,1,nil,ft)
	e:SetLabelObject(g1:GetFirst())
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_POSCHANGE)
	local g2=Duel.SelectTarget(tp,s.filter2,tp,0,LOCATION_MZONE,1,1,nil)
	g1:Merge(g2)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g1,2,0,0)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
end
function s.pfilter(c,e)
	return c:IsPosition(POS_FACEUP_ATTACK) and c:IsRelateToEffect(e)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetChainInfo(0,CHAININFO_TARGET_CARDS):Filter(s.pfilter,nil,e)
	if #g==2 then
		Duel.ChangePosition(g,POS_FACEUP_DEFENSE)
		local tc=e:GetLabelObject()
		if not tc:IsImmuneToEffect(e) and tc:IsReleasable() and (Duel.GetLocationCount(tp,LOCATION_MZONE)>0 or tc:GetSequence()<5) then
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
			local sg=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND,0,1,1,nil,e,tp)
			Duel.BreakEffect()
			Duel.Release(tc,REASON_EFFECT)
			Duel.BreakEffect()
			Duel.SpecialSummon(sg,0,tp,tp,false,false,POS_FACEUP)
		end
	end
end