Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
"Elemental HERO Bubbleman" + "Elemental HERO Avian" Must be Fusion Summoned. While you have any Set card(s) in your Spell & Trap Zone, this card can attack your opponent directly.
--E・HERO セイラーマン
--Elemental HERO Mariner
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMix(c,true,true,79979666,21844576)
	--spsummon condition
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	e1:SetValue(aux.fuslimit)
	c:RegisterEffect(e1)
	--direct attack
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_DIRECT_ATTACK)
	e2:SetCondition(s.dacon)
	c:RegisterEffect(e2)
end
s.material_setcode={SET_HERO,SET_ELEMENTAL_HERO}
function s.filter(c)
	return c:IsFacedown() and c:GetSequence()~=5
end
function s.dacon(e)
	return Duel.IsExistingMatchingCard(s.filter,e:GetHandlerPlayer(),LOCATION_SZONE,0,1,nil)
end