Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
While you control a Token, your opponent's monsters cannot target "Generaider" Effect Monsters for attacks. If a "Generaider" Effect Monster is destroyed by battle: Your opponent draws 1 card. You can only use this effect of "Generaider Boss Loot" once per turn.
--王の報酬
--Generaider Boss Loot
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--Your opponent's monsters cannot target "Generaider" Effect Monsters for attacks
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(0,LOCATION_MZONE)
	e2:SetCode(EFFECT_CANNOT_SELECT_BATTLE_TARGET)
	e2:SetCondition(s.atcon)
	e2:SetValue(s.atlimit)
	c:RegisterEffect(e2)
	--Your opponent draws 1 card
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_DRAW)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_DESTROYED)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1,id)
	e3:SetCondition(s.drcon)
	e3:SetTarget(s.drtg)
	e3:SetOperation(s.drop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_GENERAIDER}
function s.tknfilter(c)
	return c:IsType(TYPE_TOKEN) or c:IsOriginalType(TYPE_TOKEN)
end
function s.atcon(e)
	return Duel.IsExistingMatchingCard(s.tknfilter,e:GetHandlerPlayer(),LOCATION_ONFIELD,0,1,nil)
end
function s.atlimit(e,c)
	return c:IsFaceup() and c:IsType(TYPE_EFFECT) and c:IsSetCard(SET_GENERAIDER)
end
function s.cfilter(c)
	return c:IsReason(REASON_BATTLE) and c:IsPreviousSetCard(SET_GENERAIDER) and c:IsType(TYPE_EFFECT)
end
function s.drcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil)
end
function s.drtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetTargetPlayer(1-tp)
	Duel.SetTargetParam(1)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,1-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