Fill in the grid by editing the previous image, filling in only one square at a time with your own art, to (eventually) create a whole picture!
Don't make a new edit if the latest one was yours.
When you're about to start, reserve your place by declaring what square you're going to edit - don't start if someone else has already declared (unless it's been, say, 24 hours) - so that no-one starts working on the same square as you.
Try to make your square continuous from the ones around it (although you don't have to pick a square that's adjacent to one that's already filled).
No overlapping onto other unfilled squares, or onto already-filled ones.
Please save in a format that will preserve all the pixels already present (i.e. png or bmp, not jpg or gif).
Here's the starting image:
And here's my edit of B2, to start us off - please continue from this image!
