Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If "Advanced Dark" is not in a Field Zone, send this monster to the GY. Once per turn (Quick Effect): You can target 1 face-up monster on the field; change its battle position. If this face-up card is destroyed in a Monster Zone, you can place it face-up in your Spell & Trap Zone as a Continuous Spell, instead of sending it to the GY.
--Ａ宝玉獣エメラルド・タートル
--Advanced Crystal Beast Emerald Tortoise
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	Duel.EnableGlobalFlag(GLOBALFLAG_SELF_TOGRAVE)
	--Send itself to the GY if "Adanced Dark" is not face-up in the Field Spell Zone
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCode(EFFECT_SELF_TOGRAVE)
	e1:SetCondition(s.tgcon)
	c:RegisterEffect(e1)
	--Change the target's battle position
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_POSITION)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_FREE_CHAIN)
	e2:SetRange(LOCATION_MZONE)
	e2:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E|TIMING_BATTLE_START)
	e2:SetCountLimit(1)
	e2:SetTarget(s.postg)
	e2:SetOperation(s.posop)
	c:RegisterEffect(e2)
	--Place itself in the S/T instead of sending it to the GY
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetCode(EFFECT_TO_GRAVE_REDIRECT_CB)
	e3:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e3:SetCondition(s.replacecon)
	e3:SetOperation(s.replaceop)
	c:RegisterEffect(e3)
end
s.listed_names={CARD_ADVANCED_DARK}
function s.tgcon(e)
	return not Duel.IsEnvironment(CARD_ADVANCED_DARK)
end
function s.filter(c)
	return c:IsFaceup() and c:IsCanChangePosition()
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and s.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_POSCHANGE)
	local g=Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,1,0,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.ChangePosition(tc,POS_FACEUP_DEFENSE,POS_FACEDOWN_DEFENSE,POS_FACEUP_ATTACK,POS_FACEUP_ATTACK)
	end
end
function s.replacecon(e)
	local c=e:GetHandler()
	return c:IsFaceup() and c:IsLocation(LOCATION_MZONE) and c:IsReason(REASON_DESTROY)
end
function s.replaceop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local e1=Effect.CreateEffect(c)
	e1:SetCode(EFFECT_CHANGE_TYPE)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD&~RESET_TURN_SET)
	e1:SetValue(TYPE_SPELL+TYPE_CONTINUOUS)
	c:RegisterEffect(e1)
	Duel.RaiseEvent(c,EVENT_CUSTOM+CARD_CRYSTAL_TREE,e,0,tp,0,0)
end