function gt_wumpus()
   
   --Definitions
   congestion_city_nodes = {};
   congestion_city_edges = {};
   visited_nodes = {};
   
   NODE_NUM = 30;
   EDGE_NUM = 45;
   WORM_NUM = 3
   COP_ODDS = 15;
   
   math.randomseed(os.time());
   
end

function random_node()
   return 1+math.random(NODE_NUM);
end

function edge_pair(a,b)
   if not (a == b) then return { {a,b}, {b,a} }; else return edge_pair(random_node(), random_node()); end
end

function make_edge_list()
   tbl = {};
   
   for i=1, NODE_NUM do
   edge = {};
      edge = edge_pair(random_node(), random_node());
      table.insert(tbl, edge[1]); table.insert(tbl, edge[2]);
   end
   return tbl;
end


gt_wumpus();

--testing make_edge_list
A = make_edge_list();
for i,v in ipairs(A) do print("(", v[1], "->", v[2], ")"); end