Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If you control 2 or more WIND monsters, and no non-WIND monsters: You can Special Summon this card from your hand. A WIND Synchro Monster that was Summoned using this card as Synchro Material cannot be destroyed by your opponent's card effects.
--ＷＷ－スノウ・ベル
--Windwitch - Snow Bell
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon itself from the hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--A WIND Synchro Monster summoned using this card cannot be destroyed by your opponent's card effects
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e2:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e2:SetCode(EVENT_BE_MATERIAL)
	e2:SetCondition(s.efcon)
	e2:SetOperation(s.efop)
	c:RegisterEffect(e2)
end
function s.nonwindfilter(c)
	return c:IsFacedown() or c:IsAttributeExcept(ATTRIBUTE_WIND)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsAttribute,ATTRIBUTE_WIND),tp,LOCATION_MZONE,0,2,nil)
		and not Duel.IsExistingMatchingCard(s.nonwindfilter,tp,LOCATION_MZONE,0,1,nil)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)
	end
end
function s.efcon(e,tp,eg,ep,ev,re,r,rp)
	return r==REASON_SYNCHRO and e:GetHandler():GetReasonCard():IsAttribute(ATTRIBUTE_WIND)
end
function s.efop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local rc=c:GetReasonCard()
	--Cannot be destroyed by opponent's card effects
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(3060)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CLIENT_HINT)
	e1:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e1:SetLabel(ep)
	e1:SetValue(s.tgval)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	rc:RegisterEffect(e1)
end
function s.tgval(e,re,rp)
	return rp==1-e:GetLabel()
end