Grid of Colored Lines

I found a massive sheet of folded paper spread across the coffee table—an actual transit map! First, I tapped the thick paper corner with my foot, just to make sure it wouldn't flip over. It held completely solid! I walked along a bright blue line, stepping carefully over each junction. It feels like an entire expedition route right here in the room. I even dragged over a shiny silver paperclip to mark what must be the central harbor stop, setting my little brown suitcase down right beside the main line.