Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When an Attack Position "Destiny HERO" monster you control is targeted for an attack: Target it; change it to Defense Position and equip it with this card. The equipped monster cannot be destroyed by battle.
--D－シールド
--D - Shield
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_EQUIP)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_BE_BATTLE_TARGET)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCondition(s.condition)
	e1:SetCost(aux.RemainFieldCost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
s.listed_series={SET_DESTINY_HERO}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	local tc=eg:GetFirst()
	return tc:IsControler(tp) and tc:IsPosition(POS_FACEUP_ATTACK) and tc:IsCanChangePosition() and tc:IsSetCard(SET_DESTINY_HERO)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc==eg:GetFirst() end
	if chk==0 then return e:IsHasType(EFFECT_TYPE_ACTIVATE) and eg:GetFirst():IsCanBeEffectTarget(e) end
	Duel.SetTargetCard(eg)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,e:GetHandler(),1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsLocation(LOCATION_SZONE) or not c:IsRelateToEffect(e) or c:IsStatus(STATUS_LEAVE_CONFIRMED) then return end
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) and tc:IsFaceup() then
		Duel.ChangePosition(tc,POS_FACEUP_DEFENSE)
		Duel.Equip(tp,c,tc)
		--Atkup
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_EQUIP)
		e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
		e1:SetValue(1)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e1)
		--Equip limit
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_EQUIP_LIMIT)
		e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e2:SetValue(s.eqlimit)
		e2:SetLabelObject(tc)
		e2:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e2)
	else
		c:CancelToGrave(false)
	end
end
function s.eqlimit(e,c)
	return c==e:GetLabelObject()
end