Displaying the scrolling objects

Not a lot of time to work on Frogger lately and most of the work has been RE, so even less to show for it. However I do have the scrolling objects displaying now. Maybe I'm not very observant, but I didn't realise that each row had a single object type on it; even all the logs are the same size on a particular row. Anyway, the game cycles through a grand total of five (5) different layouts in sequence.