Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
The effects of Effect Monsters with A-Counters are negated, except for "Alien Mars".
--エーリアン・マーズ
--Alien Mars
local s,id=GetID()
function s.initial_effect(c)
	--disable
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetRange(LOCATION_MZONE)
	e1:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
	e1:SetCode(EFFECT_DISABLE)
	e1:SetTarget(s.distg)
	c:RegisterEffect(e1)
end
s.counter_list={COUNTER_A}
function s.distg(e,c)
	return c:GetCounter(COUNTER_A)>0 and c:GetCode()~=id
end