Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You do not pay Life Points to activate Spell Cards.
--魔力倹約術
--Spell Economics
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)
	--Cost Change
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_LPCOST_CHANGE)
	e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(1,0)
	e2:SetValue(s.costchange)
	c:RegisterEffect(e2)
end
function s.costchange(e,re,rp,val)
	if re and re:IsHasType(EFFECT_TYPE_ACTIVATE) and re:GetHandler():IsSpell() and not mustpay then
		return 0
	else
		return val
	end
end