Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When this card is Normal Summoned: You can Special Summon 1 Level 6 or lower Fish monster from your hand in Defense Position, but banish it when it leaves the field. If this card is banished: You can Special Summon this card in Defense Position. You can only use this effect of "Aspischool" once per turn.
--アスピスクール
--Aspischool
--Scripted by Hatter
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon 1 Level 6 or lower Fish monster from your hand in Defense Position, but banish it when it leaves the field
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetTarget(s.handsptg)
	e1:SetOperation(s.handspop)
	c:RegisterEffect(e1)
	--Special Summon this card in Defense Position
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_REMOVE)
	e2:SetCountLimit(1,id)
	e2:SetTarget(s.selfsptg)
	e2:SetOperation(s.selfspop)
	c:RegisterEffect(e2)
end
function s.handspfilter(c,e,tp)
	return c:IsLevelBelow(6) and c:IsRace(RACE_FISH) and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
end
function s.handsptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.handspfilter,tp,LOCATION_HAND,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
end
function s.handspop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)==0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local sc=Duel.SelectMatchingCard(tp,s.handspfilter,tp,LOCATION_HAND,0,1,1,nil,e,tp):GetFirst()
	if sc and Duel.SpecialSummonStep(sc,0,tp,tp,false,false,POS_FACEUP_DEFENSE) then
		--Banish it when it leaves the field
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetDescription(3300)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CLIENT_HINT)
		e1:SetCode(EFFECT_LEAVE_FIELD_REDIRECT)
		e1:SetValue(LOCATION_REMOVED)
		e1:SetReset(RESET_EVENT|RESETS_REDIRECT)
		sc:RegisterEffect(e1,true)
	end
	Duel.SpecialSummonComplete()
end
function s.selfsptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
end
function s.selfspop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP_DEFENSE)
	end
end