Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Each time a "Six Samurai" monster(s) is Normal or Special Summoned, place 1 Bushido Counter on this card (max. 2). You can send this card to the GY; draw 1 card for each Bushido Counter on this card.
--六武衆の結束
--Six Samurai United
local s,id=GetID()
function s.initial_effect(c)
	c:EnableCounterPermit(COUNTER_BUSHIDO)
	c:SetCounterLimit(COUNTER_BUSHIDO,2)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--add counter
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCode(EVENT_SUMMON_SUCCESS)
	e2:SetOperation(s.ctop)
	c:RegisterEffect(e2)
	local e3=e2:Clone()
	e3:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e3)
	--draw
	local e4=Effect.CreateEffect(c)
	e4:SetCategory(CATEGORY_DRAW)
	e4:SetDescription(aux.Stringid(id,0))
	e4:SetType(EFFECT_TYPE_IGNITION)
	e4:SetRange(LOCATION_SZONE)
	e4:SetCost(s.drcost)
	e4:SetTarget(s.drtg)
	e4:SetOperation(s.drop)
	c:RegisterEffect(e4)
	--cannot link material
	local e5=Effect.CreateEffect(c)
	e5:SetType(EFFECT_TYPE_SINGLE)
	e5:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e5:SetCode(EFFECT_CANNOT_BE_LINK_MATERIAL)
	e5:SetValue(1)
	c:RegisterEffect(e5)
end
s.listed_series={SET_SIX_SAMURAI}
s.counter_place_list={COUNTER_BUSHIDO}
function s.ctfilter(c)
	return c:IsFaceup() and c:IsSetCard(SET_SIX_SAMURAI)
end
function s.ctop(e,tp,eg,ep,ev,re,r,rp)
	if eg:IsExists(s.ctfilter,1,nil) then
		e:GetHandler():AddCounter(COUNTER_BUSHIDO,1)
	end
end
function s.drcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsAbleToGraveAsCost() end
	local ct=e:GetHandler():GetCounter(COUNTER_BUSHIDO)
	e:SetLabel(ct)
	Duel.SendtoGrave(e:GetHandler(),REASON_COST)
end
function s.drtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:GetCounter(COUNTER_BUSHIDO)>0 and Duel.IsPlayerCanDraw(tp,c:GetCounter(COUNTER_BUSHIDO)) end
	local ct=e:GetLabel()
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(ct)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,ct)
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