Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
This card on the field can be treated as a Level 8 monster when used for a Synchro Summon. A Synchro Monster that used this card as material gains this effect based on its original Level. ● 8 or lower: Gains 800 ATK/DEF. ● 9 or higher: If this card attacks a Defense Position monster, inflict piercing battle damage.
--ヤマタコオロチ
--Yamatako Orochi
--Scripted by Hatter
local s,id=GetID()
function s.initial_effect(c)
	--Can be treated as Level 8 for a Synchro Summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_SYNCHRO_LEVEL)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_ONFIELD)
	e1:SetValue(function(e) return 8*65536+e:GetHandler():GetLevel() end)
	c:RegisterEffect(e1)
	--Synchro Monster gains effect
	local e2=Effect.CreateEffect(c)
	e2:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EVENT_BE_MATERIAL)
	e2:SetCondition(s.effcon)
	e2:SetOperation(s.effop)
	c:RegisterEffect(e2)
end
function s.effcon(e,tp,eg,ep,ev,re,r,rp)
	return r==REASON_SYNCHRO and e:GetHandler():GetReasonCard():HasLevel()
end
function s.effop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local rc=c:GetReasonCard()
	if rc:GetOriginalLevel()<=8 then
		--Gain 800 ATK/DEF
		local e1=Effect.CreateEffect(rc)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(800)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		rc:RegisterEffect(e1)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_UPDATE_DEFENSE)
		rc:RegisterEffect(e2)
	else
		--Inflict piercing damage
		local e1=Effect.CreateEffect(rc)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_PIERCE)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		rc:RegisterEffect(e1)
	end
	if not rc:IsType(TYPE_EFFECT) then
		local e3=Effect.CreateEffect(c)
		e3:SetType(EFFECT_TYPE_SINGLE)
		e3:SetCode(EFFECT_ADD_TYPE)
		e3:SetValue(TYPE_EFFECT)
		e3:SetReset(RESET_EVENT|RESETS_STANDARD)
		rc:RegisterEffect(e3,true)
	end
	rc:RegisterFlagEffect(0,RESET_EVENT|RESETS_STANDARD,EFFECT_FLAG_CLIENT_HINT,1,0,aux.Stringid(id,0))
end