Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Each time a Spell Card is activated, place 1 Spell Counter on this card when that Spell Card resolves. If the 4th Spell Counter is placed on this card: Destroy this card, and if you do, the player who activated the Spell Card at that time takes 3000 damage.
--バベル・タワー
--Tower of Babel
local s,id=GetID()
function s.initial_effect(c)
	c:EnableCounterPermit(COUNTER_SPELL)
	--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:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_FIELD)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e2:SetCode(EVENT_CHAINING)
	e2:SetRange(LOCATION_SZONE)
	e2:SetOperation(aux.chainreg)
	c:RegisterEffect(e2)
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_FIELD)
	e3:SetCode(EVENT_CHAIN_SOLVED)
	e3:SetRange(LOCATION_SZONE)
	e3:SetOperation(s.acop)
	c:RegisterEffect(e3)
	--destroy&damage
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,0))
	e4:SetCategory(CATEGORY_DESTROY+CATEGORY_DAMAGE)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e4:SetCode(EVENT_CUSTOM+id)
	e4:SetTarget(s.damtg)
	e4:SetOperation(s.damop)
	c:RegisterEffect(e4)
	local e5=Effect.CreateEffect(c)
	e5:SetCategory(CATEGORY_DESTROY)
	e5:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e5:SetCode(EVENT_ADD_COUNTER+COUNTER_SPELL)
	e5:SetCondition(s.descon)
	e5:SetTarget(s.destg)
	e5:SetOperation(s.desop)
	c:RegisterEffect(e5)
end
s.counter_place_list={COUNTER_SPELL}
function s.acop(e,tp,eg,ep,ev,re,r,rp)
	local p=Duel.GetChainInfo(ev,CHAININFO_TRIGGERING_PLAYER)
	local c=e:GetHandler()
	if re:IsHasType(EFFECT_TYPE_ACTIVATE) and re:IsSpellEffect() and c:GetFlagEffect(1)>0 then
		c:AddCounter(COUNTER_SPELL,1)
		if c:GetCounter(COUNTER_SPELL)==4 then
			Duel.RaiseSingleEvent(c,EVENT_CUSTOM+id,re,0,0,p,0)
		end
	end
end
function s.damtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsRelateToEffect(e) end
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,ep,3000)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,e:GetHandler(),1,0,0)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	if Duel.Destroy(e:GetHandler(),REASON_EFFECT)~=0 then
		Duel.Damage(ep,3000,REASON_EFFECT)
	end
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	return re:GetHandler()~=e:GetHandler() and e:GetHandler():GetCounter(COUNTER_SPELL)>=4
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,e:GetHandler(),1,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	Duel.Destroy(e:GetHandler(),REASON_EFFECT)
end