Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
"Gem-Knight Garnet" + 1 "Gem-Knight" monster Must first be Fusion Summoned with the above Fusion Material Monsters. Once per turn: You can Tribute 1 face-up "Gem-" monster; this card gains ATK equal to the Tributed monster's ATK on the field, until the End Phase. If this card attacks a Defense Position monster, inflict piercing Battle Damage to your opponent.
--ジェムナイト・ルビーズ
--Gem-Knight Ruby
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMix(c,false,false,91731841,aux.FilterBoolFunctionEx(Card.IsSetCard,SET_GEM_KNIGHT))
	--spsummon condition
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e2:SetCode(EFFECT_SPSUMMON_CONDITION)
	e2:SetValue(s.splimit)
	c:RegisterEffect(e2)
	--atkup
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_ATKCHANGE)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1)
	e3:SetCost(s.atkcost)
	e3:SetOperation(s.atkop)
	c:RegisterEffect(e3)
	--pierce
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_SINGLE)
	e4:SetCode(EFFECT_PIERCE)
	c:RegisterEffect(e4)
end
s.listed_series={SET_GEM,SET_GEM_KNIGHT}
s.material_setcode={SET_GEM,SET_GEM_KNIGHT}
function s.splimit(e,se,sp,st)
	return not e:GetHandler():IsLocation(LOCATION_EXTRA) or (st&SUMMON_TYPE_FUSION)==SUMMON_TYPE_FUSION
end
function s.costfilter(c)
	return c:IsFaceup() and c:IsSetCard(SET_GEM)
end
function s.atkcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckReleaseGroupCost(tp,s.costfilter,1,false,nil,e:GetHandler()) end
	local rg=Duel.SelectReleaseGroupCost(tp,s.costfilter,1,1,false,nil,e:GetHandler())
	e:SetLabel(rg:GetFirst():GetAttack())
	Duel.Release(rg,REASON_COST)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsFacedown() or not c:IsRelateToEffect(e) then return end
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(e:GetLabel())
	e1:SetReset(RESETS_STANDARD_DISABLE_PHASE_END)
	c:RegisterEffect(e1)
end