Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When this card declares an attack: You can change the attack target to Defense Position. When you take battle damage while this card is attacking: You can Special Summon 1 monster from your hand with ATK less than or equal to the battle damage you took.
--ターボ・シンクロン
--Turbo Synchron
local s,id=GetID()
function s.initial_effect(c)
	--Change the position of the attacked monster
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	e1:SetTarget(s.postg)
	e1:SetOperation(s.posop)
	c:RegisterEffect(e1)
	--Special Summon 1 monster from the hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCode(EVENT_DAMAGE)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local d=Duel.GetAttackTarget()
	if chkc then return chkc==d end
	if chk==0 then return d and d:IsAttackPos() and d:IsCanChangePosition() end
	Duel.SetTargetCard(d)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,d,1,0,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) and tc:IsAttackPos() then
		Duel.ChangePosition(tc,POS_FACEUP_DEFENSE)
	end
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return r==REASON_BATTLE and ep==tp and Duel.GetAttacker()==e:GetHandler()
end
function s.filter(c,e,tp,dam)
	return c:IsAttackBelow(dam) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_HAND,0,1,nil,e,tp,ev) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_HAND,0,1,1,nil,e,tp,ev)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end