Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
[ Pendulum Effect ] You cannot Pendulum Summon monsters, except "D/D" monsters. This effect cannot be negated. Once per turn, during your Standby Phase: Increase this card's Pendulum Scale by 2 (max. 10), then destroy all monsters you control with a Level less than or equal to this card's Pendulum Scale, except "D/D" monsters. ---------------------------------------- [ Monster Effect ] During either player's turn: You can discard this card, then target 1 "D/D" or "Dark Contract" card you control; return it to the hand. You can only use this effect of "D/D Savant Galilei" once per turn.
--DD魔導賢者ガリレイ
--D/D Savant Galilei
local s,id=GetID()
function s.initial_effect(c)
	--pendulum summon
	Pendulum.AddProcedure(c)
	--splimit
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_PZONE)
	e2:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET+EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CANNOT_NEGATE)
	e2:SetTargetRange(1,0)
	e2:SetTarget(s.splimit)
	c:RegisterEffect(e2)
	--scale change
	local e3=Effect.CreateEffect(c)
	e3:SetCategory(CATEGORY_DESTROY)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetRange(LOCATION_PZONE)
	e3:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e3:SetCountLimit(1)
	e3:SetCondition(s.sccon)
	e3:SetTarget(s.sctg)
	e3:SetOperation(s.scop)
	c:RegisterEffect(e3)
	--tohand
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,0))
	e4:SetCategory(CATEGORY_TOHAND)
	e4:SetType(EFFECT_TYPE_QUICK_O)
	e4:SetCode(EVENT_FREE_CHAIN)
	e4:SetRange(LOCATION_HAND)
	e4:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e4:SetCountLimit(1,id)
	e4:SetCost(Cost.SelfDiscard)
	e4:SetTarget(s.thtg)
	e4:SetOperation(s.thop)
	c:RegisterEffect(e4)
end
s.listed_series={SET_DD,SET_DARK_CONTRACT}
function s.splimit(e,c,sump,sumtype,sumpos,targetp)
	return not c:IsSetCard(SET_DD) and (sumtype&SUMMON_TYPE_PENDULUM)==SUMMON_TYPE_PENDULUM
end
function s.sccon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsTurnPlayer(tp)
end
function s.filter(c,lv)
	return c:IsFaceup() and not c:IsSetCard(SET_DD) and c:IsLevelBelow(lv)
end
function s.sctg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local scl=math.min(10,e:GetHandler():GetLeftScale()+2)
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_MZONE,0,nil,scl)
	if e:GetHandler():GetLeftScale()<10 then
		Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,0,0)
	end
end
function s.scop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) or c:GetLeftScale()>=10 then return end
	local scl=2
	if c:GetLeftScale()==9 then scl=1 end
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_LSCALE)
	e1:SetValue(scl)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_UPDATE_RSCALE)
	c:RegisterEffect(e2)
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_MZONE,0,nil,c:GetLeftScale())
	if #g>0 then
		Duel.BreakEffect()
		Duel.Destroy(g,REASON_EFFECT)
	end
end
function s.thfilter(c)
	return c:IsFaceup() and (c:IsSetCard(SET_DARK_CONTRACT) or c:IsSetCard(SET_DD)) and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsOnField() and chkc:IsControler(tp) and s.thfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.thfilter,tp,LOCATION_ONFIELD,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_RTOHAND)
	local g=Duel.SelectTarget(tp,s.thfilter,tp,LOCATION_ONFIELD,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,g,1,0,0)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.SendtoHand(tc,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,tc)
	end
end