Need some help with Hunt-and-Kill?

Hi, I hope this is a reasonable question. I do not understand this script at all. It's from the wiki, and I just don't get it. I'm probably an Intermediate scripter, however I don't know things like what a "node" is, and how this script was set up and what exactly it does. I'm really interested in it, I've been studying it for a while and I'd like some help breaking this down just a little? Or at least lead me into a direction to where I can smoothly read this script? I don't understand things like neighbors, and some of the very foreign syntax. Thanks for the help if you can. The wiki article I was looking at is here:

http://wiki.roblox.com/index.php?title=Hunt-and-Kill

Here's the script from that article, if you need it:

function Hunt_and_Kill(node)
	node.visited = true
 
	--Take visited neighbors out of the possible selections
	local neighbors = node:neighbors()
	for i=#neighbors,1,-1 do
		if neighbors[i].visited then
			table.remove(neighbors,i)
		end
	end
	--if there are unvisited neighbors of node, select a random one
	if #neighbors>0 then
		local new_node = neighbors[math.random(#neighbors)]
		--delete the wall between the two nodes
		deleteBetween(node,new_node)
		--repeat process on new_node
		Hunt_and_Kill(new_node)
 
	--if there are no unvisited neighbors, begin hunt for new neighbor
	else
		for y = 1, bottom_of_maze do
			for x = 1, end_of_maze do
				--if the node has not been visited and is next to a visited neighbor, select
				if not maze[x][y].visited then
					local visitedNeighbor = false
					for _, neighbor in pairs(maze[x][y]:neighbors()) do
						if v.visted then
							visitedNeighbor = neighbor
							break
						end
					end
					--if found, begin process over again
					if visitedNeighbor then
						Hunt_and_Kill(visitedNeighbor)
					end
				end
			end
		end
	end
end