Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn, during your opponent's Standby Phase: Place 1 Clock Counter on this card. While there are 4 or more Clock Counters on this card, you do not take any battle damage. If this card with 4 or more Clock Counters is destroyed and sent to the GY: Special Summon 1 "Destiny HERO - Dreadmaster" from your hand or Deck.
--幽獄の時計塔
--Clock Tower Prison
local s,id=GetID()
function s.initial_effect(c)
	c:EnableCounterPermit(0x1b)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--add counter
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_COUNTER)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e2:SetRange(LOCATION_FZONE)
	e2:SetCountLimit(1)
	e2:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e2:SetCondition(s.ctcon)
	e2:SetOperation(s.ctop)
	c:RegisterEffect(e2)
	--avoid battle damage
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD)
	e3:SetCode(EFFECT_AVOID_BATTLE_DAMAGE)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetRange(LOCATION_FZONE)
	e3:SetTargetRange(1,0)
	e3:SetCondition(s.dcon)
	c:RegisterEffect(e3)
	--register a flag to allow special summon
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e4:SetCode(EVENT_LEAVE_FIELD_P)
	e4:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e4:SetOperation(s.regop)
	c:RegisterEffect(e4)
	--special summon
	local e5=Effect.CreateEffect(c)
	e5:SetDescription(aux.Stringid(id,1))
	e5:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e5:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e5:SetCode(EVENT_TO_GRAVE)
	e5:SetCondition(s.spcon)
	e5:SetTarget(s.sptg)
	e5:SetOperation(s.spop)
	e5:SetLabelObject(e4)
	c:RegisterEffect(e5)
end
s.counter_place_list={0x1b}
s.listed_names={40591390}
function s.dcon(e)
	return e:GetHandler():GetCounter(0x1b)>=4
end
function s.ctcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsTurnPlayer(1-tp)
end
function s.ctop(e,tp,eg,ep,ev,re,r,rp)
	e:GetHandler():AddCounter(0x1b,1)
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	if e:GetHandler():GetCounter(0x1b)>=4 then
		e:SetLabel(1)
	else
		e:SetLabel(0)
	end
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsReason(REASON_DESTROY) and e:GetLabelObject():GetLabel()==1
end
function s.spfilter(c,e,tp)
	return c:IsCode(40591390) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND|LOCATION_DECK)
end
function s.spop(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 g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND|LOCATION_DECK,0,1,1,nil,e,tp)
	if g and #g>0 then
		Duel.SpecialSummon(g,1,tp,tp,false,false,POS_FACEUP)
	end
end