how to get a random map out of this?

im getting a bit confused on how i can make this script get a random map from a group in game.Lighting.Maps

local maps = game.Lighting.Maps:GetChildren()

while true do
	for i =1,#maps do
		maps[i].math.random(3) -- "3" would be the amount of maps in the group
		wait(1) -- just to make sure it wont crash..
		print (maps[i].Name) -- this would just be to see if it works
	end
end