How to make Glowing Player Halos for Murdermode?

I want to make murderer can see player glowing outline through walls
when murderer get maybe 10 or 12 loots maybe.

Effects like this. http://steamcommunity.com/sharedfiles/filedetails/?id=235603435&searchtext=l4d+glow

sv_loot.lua
here is a murderer crossbow code.



local function giveCrossbow(ply) --석궁주는거
	--이미 석궁 가지고있는놈일때의 코드 
	if ply:HasWeapon("weapon_crossbow") then
	     --ply:GiveAmmo(1, "XBowBolt", true) --석궁 탄약 1발 더
	else
		ply:Give("weapon_crossbow")
		ply:RemoveAmmo(4, "XBowBolt") --탄약 5개 기본중 4개 뻇고 1개만 남김
		--ply:SelectWeapon("weapon_crossbow") --크로스보우 얻을때애 그 무기를 들고있을껀지 아닌지
	end
end




	if ply:GetMurderer() then
	    if ply.LootCollected == 7 then
		    giveCrossbow(ply)
			PrintMessage(HUD_PRINTTALK, "<WARNNING!> 살인자가 Crossbow를 얻었습니다!!" )
			for k,v in pairs(player.GetAll()) do
                v:EmitSound("ambient/alarms/alarm_citizen_loop1.mp3")
			end			
	    end
		--if ply.LootCollected % 15 == 0 then
		--	giveCrossbow(ply)
		--end
		if ply.LootCollected == 10 then
			PLAYER GLOW HALOS ← but i don't know what function need for, of which addons are work to murderer.
		end
	end


I think glow effects will work write script like that.

Any addons for glowing player halos for murderer?
or any scripts…?
I don’t know lua much.
So I was searched on facepunch and found many scripts, but i can’t understand and use it.

Any one help me?

Use the halo.Add function. Careful, apparently it’s a “Frame Killer”, but when I used it, I was fine.

E: Linked