Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by removing from play a Rock-Type monster(s) in your Graveyard. The original ATK and DEF of this card become the number of Rock-Type monsters you removed from play when you Special Summoned this card x 700.
--メガロック・ドラゴン
--Megarock Dragon
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	c:AddMustBeSpecialSummoned()
	--Must be Special Summoned (from your hand) by banishing any number of Rock monster(s) from your GY
	local e0=Effect.CreateEffect(c)
	e0:SetDescription(aux.Stringid(id,0))
	e0:SetType(EFFECT_TYPE_FIELD)
	e0:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e0:SetCode(EFFECT_SPSUMMON_PROC)
	e0:SetRange(LOCATION_HAND)
	e0:SetCondition(s.spcon)
	e0:SetTarget(s.sptg)
	e0:SetOperation(s.spop)
	c:RegisterEffect(e0)
end
function s.spconfilter(c,tp)
	return c:IsRace(RACE_ROCK) and c:IsAbleToRemoveAsCost() and aux.SpElimFilter(c,true) and Duel.GetMZoneCount(tp,c)>0
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=e:GetHandlerPlayer()
	local g=Duel.GetMatchingGroup(s.spconfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,nil,tp)
	return #g>0 and aux.SelectUnselectGroup(g,e,tp,1,1,nil,0)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,c)
	local rg=Duel.GetMatchingGroup(s.spconfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,nil,tp)
	local g=aux.SelectUnselectGroup(rg,e,tp,1,#rg,nil,1,tp,HINTMSG_REMOVE,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.Remove(g,POS_FACEUP,REASON_COST)
	local val=#g*700
	g:DeleteGroup()
	--The original ATK/DEF of this card become the number of Rock monsters banished to Special Summon it x 700
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetCode(EFFECT_SET_BASE_ATTACK)
	e1:SetRange(LOCATION_MZONE)
	e1:SetValue(val)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE&~RESET_TOFIELD)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_SET_BASE_DEFENSE)
	c:RegisterEffect(e2)
end