Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 or more Reptile-Type "Worm" monsters For each Fusion Material Monster with a different name used to Fusion Summon this card, it gains 500 ATK, and also gains these effects: ● 2+: Once per turn, you can select 1 Reptile-Type monster in your Graveyard, and Special Summon it in face-down Defense Position. ● 4+: You can remove from play 1 Reptile-Type monster from your Graveyard to send 1 monster on the field to the Graveyard. ● 6+: Once per turn, you can draw 1 card.
--ワーム・ゼロ
--Worm Zero
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMixRep(c,true,true,s.ffilter,2,99)
	--summon success
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_MATERIAL_CHECK)
	e2:SetValue(s.matcheck)
	c:RegisterEffect(e2)
end
s.material_setcode=SET_WORM
function s.ffilter(c,fc,sumtype,tp)
	return c:IsSetCard(SET_WORM,fc,sumtype,tp) and c:IsRace(RACE_REPTILE,fc,sumtype,tp)
end
function s.matcheck(e,c)
	local ct=c:GetMaterial():GetClassCount(Card.GetCode)
	if ct>0 then
		local ae=Effect.CreateEffect(c)
		ae:SetType(EFFECT_TYPE_SINGLE)
		ae:SetCode(EFFECT_SET_ATTACK)
		ae:SetValue(ct*500)
		ae:SetReset(RESET_EVENT|(RESETS_STANDARD_DISABLE&~RESET_TOFIELD))
		c:RegisterEffect(ae)
	end
	if ct>=2 then
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(aux.Stringid(id,0))
		e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
		e1:SetType(EFFECT_TYPE_IGNITION)
		e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
		e1:SetRange(LOCATION_MZONE)
		e1:SetCountLimit(1)
		e1:SetTarget(s.sptg)
		e1:SetOperation(s.spop)
		e1:SetReset(RESET_EVENT|(RESETS_STANDARD&~RESET_TOFIELD))
		c:RegisterEffect(e1)
	end
	if ct>=4 then
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(aux.Stringid(id,1))
		e1:SetCategory(CATEGORY_TOGRAVE)
		e1:SetType(EFFECT_TYPE_IGNITION)
		e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
		e1:SetRange(LOCATION_MZONE)
		e1:SetCost(s.tgcost)
		e1:SetTarget(s.tgtg)
		e1:SetOperation(s.tgop)
		e1:SetReset(RESET_EVENT|(RESETS_STANDARD&~RESET_TOFIELD))
		c:RegisterEffect(e1)
	end
	if ct>=6 then
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(aux.Stringid(id,2))
		e1:SetCategory(CATEGORY_DRAW)
		e1:SetType(EFFECT_TYPE_IGNITION)
		e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
		e1:SetRange(LOCATION_MZONE)
		e1:SetCountLimit(1)
		e1:SetTarget(s.drtg)
		e1:SetOperation(s.drop)
		e1:SetReset(RESET_EVENT|(RESETS_STANDARD&~RESET_TOFIELD))
		c:RegisterEffect(e1)
	end
end
function s.spfilter(c,e,tp)
	return c:IsRace(RACE_REPTILE) and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEDOWN_DEFENSE)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_GRAVE) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEDOWN_DEFENSE)
		Duel.ConfirmCards(1-tp,tc)
	end
end
function s.costfilter(c)
	return c:IsRace(RACE_REPTILE) and c:IsAbleToRemoveAsCost() and aux.SpElimFilter(c,true)
end
function s.tgcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.costfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
	local rg=Duel.SelectMatchingCard(tp,s.costfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,1,nil)
	Duel.Remove(rg,POS_FACEUP,REASON_COST)
end
function s.tgtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) end
	if chk==0 then return Duel.IsExistingTarget(nil,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectTarget(tp,nil,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,g,1,0,0)
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SendtoGrave(tc,REASON_EFFECT)
	end
end
function s.drtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDraw(tp,1) end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(1)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,1)
end
function s.drop(e,tp,eg,ep,ev,re,r,rp)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Draw(p,d,REASON_EFFECT)
end