Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If you control a Reptile monster, you can Special Summon this card (from your hand). You can only Special Summon "Black Mamba" once per turn this way. If this card is Normal or Special Summoned: You can target 1 monster your opponent controls; send 1 Reptile monster from your Deck to the GY, and if you do, change the targeted monster's battle position. You can only use this effect of "Black Mamba" once per turn.
--ブラックマンバ
--Black Mamba
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,{id,0},EFFECT_COUNT_CODE_OATH)
	e1:SetCondition(s.spcon)
	c:RegisterEffect(e1)
	--Send to the GY and change battle position
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_TOGRAVE+CATEGORY_POSITION)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_SUMMON_SUCCESS)
	e2:SetCountLimit(1,{id,1})
	e2:SetTarget(s.postg)
	e2:SetOperation(s.posop)
	c:RegisterEffect(e2)
	local e3=e2:Clone()
	e3:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e3)
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=c:GetControler()
	return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsRace,RACE_REPTILE),tp,LOCATION_MZONE,0,1,nil)
end
function s.tgfilter(c)
	return c:IsRace(RACE_REPTILE) and c:IsAbleToGrave()
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE) and chkc:IsCanChangePosition() end
	if chk==0 then return Duel.IsExistingTarget(Card.IsCanChangePosition,tp,0,LOCATION_MZONE,1,nil)
		and Duel.IsExistingMatchingCard(s.tgfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	local g=Duel.SelectTarget(tp,Card.IsCanChangePosition,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,tp,LOCATION_DECK)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,1,0,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.tgfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 and Duel.SendtoGrave(g,REASON_EFFECT)>0 and g:GetFirst():IsLocation(LOCATION_GRAVE) then
		local tc=Duel.GetFirstTarget()
		if tc and tc:IsRelateToEffect(e) and tc:IsControler(1-tp) then
			Duel.ChangePosition(tc,POS_FACEUP_DEFENSE,POS_FACEDOWN_DEFENSE,POS_FACEUP_ATTACK,POS_FACEUP_ATTACK)
		end
	end
end