The story so far:
What a mess! And the mess seemingly continues. The square on the bottom right indicates that we are still confined by Europe. In theory Day 100 was to be marked by the border to signify that we had left, but we obviously haven’t so the blanket will continue. Today’s square will be made after today’s vote and be added to the top left. The cream (representing ‘white’ lies) will make a good barrier!
You can read a little more about it here