Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Send 3 cards from the top of your Deck to the Graveyard, and take 1000 damage for each Spell or Trap Card sent to the Graveyard this way.
--デステニー・デストロイ
--Destruction of Destiny
local s,id=GetID()
function s.initial_effect(c)
	--discard deck
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCategory(CATEGORY_DECKDES+CATEGORY_DAMAGE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetTarget(s.distg)
	e1:SetOperation(s.disop)
	c:RegisterEffect(e1)
end
function s.distg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDiscardDeck(tp,3) end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(3)
	Duel.SetOperationInfo(0,CATEGORY_DECKDES,nil,0,tp,3)
end
function s.filter(c)
	return c:IsLocation(LOCATION_GRAVE) and c:IsSpellTrap()
end
function s.disop(e,tp,eg,ep,ev,re,r,rp)
	local p,val=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.DiscardDeck(p,val,REASON_EFFECT)
	local g=Duel.GetOperatedGroup()
	local ct=g:FilterCount(s.filter,nil)
	if ct>0 then
		Duel.Damage(tp,ct*1000,REASON_EFFECT)
	end
end