Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
(This card is not treated as an "Armed Dragon" card.) You can Special Summon this card (from your hand) by sending 1 Level 8 or higher monster from your hand to the GY. If you Tribute this card for the Tribute Summon of a Level 7 or higher monster, that monster cannot be destroyed by card effects.
--ハードアームドラゴン
--Hardened Armed Dragon
local s,id=GetID()
function s.initial_effect(c)
	--Special summon procedure
	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:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--A level 7+ monster tribute summoned using this card cannot be destroyed by card effects
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EVENT_BE_PRE_MATERIAL)
	e2:SetCondition(s.regcon)
	e2:SetOperation(s.regop)
	c:RegisterEffect(e2)
end
function s.spfilter(c)
	return c:IsLevelAbove(8) and c:IsAbleToGraveAsCost()
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=e:GetHandlerPlayer()
	local rg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_HAND,0,c)
	return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and #rg>0 and aux.SelectUnselectGroup(rg,e,tp,1,1,nil,0)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,c)
	local c=e:GetHandler()
	local g=nil
	local rg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_HAND,0,c,tp)
	local g=aux.SelectUnselectGroup(rg,e,tp,1,1,nil,1,tp,HINTMSG_TOGRAVE,nil,nil,true)
	if #g>0 then
		g:KeepAlive()
		e:SetLabelObject(g)
		return true
	end
	return false
end
function s.spop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=e:GetLabelObject()
	if not g then return end
	Duel.SendtoGrave(g,REASON_COST)
	g:DeleteGroup()
end
function s.regcon(e,tp,eg,ep,ev,re,r,rp)
	local rc=e:GetHandler():GetReasonCard()
	return r==REASON_SUMMON and rc:IsFaceup() and rc:IsLevelAbove(7)
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local rc=c:GetReasonCard()
	--Cannot be destroyed by card effects
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(3001)
	e1:SetProperty(EFFECT_FLAG_CLIENT_HINT)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e1:SetValue(1)
	e1:SetCondition(s.indcon)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	rc:RegisterEffect(e1)
end
function s.indcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsLocation(LOCATION_MZONE)
end