List of Lists problem It is day 3 for me and I am making progress but have looked at a number of posts about lists of lists but can’t see exactly how the examples work and how I would store and retrieve and update the data. I am wanting to store a series of four pairs of X,Y coordinates from three…

Now having found how to defined the array (list) and index to an item to update it, getting the data out again is similar [zzblocks]