Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Negate all Spell effects on the field. Once per turn, during the Standby Phase, you must pay 700 LP (this is not optional), or this card is destroyed.
--王宮の勅命
--Imperial Order
local s,id=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--disable
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_DISABLE)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_SZONE,LOCATION_SZONE)
	e2:SetTarget(s.distarget)
	c:RegisterEffect(e2)
	--disable effect
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e3:SetCode(EVENT_CHAIN_SOLVING)
	e3:SetRange(LOCATION_SZONE)
	e3:SetOperation(s.disoperation)
	c:RegisterEffect(e3)
	--maintain
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e4:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e4:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e4:SetRange(LOCATION_SZONE)
	e4:SetCountLimit(1)
	e4:SetOperation(s.mtop)
	c:RegisterEffect(e4)
end
function s.distarget(e,c)
	return c~=e:GetHandler() and c:IsSpell()
end
function s.disoperation(e,tp,eg,ep,ev,re,r,rp)
	local tl=Duel.GetChainInfo(ev,CHAININFO_TRIGGERING_LOCATION)
	if (tl&LOCATION_SZONE)~=0 and re:IsSpellEffect() then
		Duel.NegateEffect(ev)
	end
end
function s.mtop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.CheckLPCost(tp,700) then
		Duel.PayLPCost(tp,700)
	else
		Duel.Destroy(e:GetHandler(),REASON_COST)
	end
end