Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn, if either player equips an Equip Card(s) to this card: You can destroy those Equip Cards, then you can destroy 1 Spell/Trap your opponent controls. Once per turn: You can send 1 Equip Card you control that is equipped to this card to the GY, then target 1 Level 7 or lower "Red-Eyes" monster in your GY; Special Summon it.
--真紅眼の鉄騎士－ギア・フリード
--Gearfried the Red-Eyes Iron Knight
local s,id=GetID()
function s.initial_effect(c)
	--destroy equip
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_EQUIP)
	e1:SetCountLimit(1)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--special summon
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1)
	e2:SetCost(s.spcost)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_RED_EYES}
function s.filter1(c,ec)
	return c:GetEquipTarget()==ec
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return eg:IsExists(s.filter1,1,nil,e:GetHandler()) end
	local g=eg:Filter(s.filter1,nil,e:GetHandler())
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local g=eg:Filter(s.filter1,nil,e:GetHandler())
	local sg=Duel.GetMatchingGroup(Card.IsSpellTrap,tp,0,LOCATION_ONFIELD,nil)
	if Duel.Destroy(g,REASON_EFFECT)~=0 and #sg>0
		and Duel.SelectYesNo(tp,aux.Stringid(id,2)) then
		Duel.BreakEffect()
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
		local tg=sg:Select(tp,1,1,nil)
		Duel.HintSelection(tg)
		Duel.Destroy(tg,REASON_EFFECT)
	end
end
function s.spcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():GetEquipGroup():IsExists(Card.IsAbleToGraveAsCost,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=e:GetHandler():GetEquipGroup():FilterSelect(tp,Card.IsAbleToGraveAsCost,1,1,nil)
	Duel.SendtoGrave(g,REASON_COST)
end
function s.spfilter(c,e,tp)
	return c:IsSetCard(SET_RED_EYES) and c:IsLevelBelow(7) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_GRAVE) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
	end
end