--File: example.lua

if SERVER then AddCSLuaFile("example.lua") end --This makes the clients download and execute this file

function propSelect() --This function is shared (it's defined both server and client-side)
	if SERVER then
		--Here you do what you need to do server-side
	end
	
	if CLIENT then
		DrawBeam()
	end

end

if CLIENT then --This block is only executed by the client-side

	function DrawBeam()
		--Here you do the trace from the player and draw the beam effect
	end
	
end