Her is the grid lay out for the creeper afghan done in common granny squares.
each square is 1 granny square. There are three shades of green and(14, in dark green, 14 in mid green and 13 in light green) and 22 squares in black.
You can find more info and picks at http://www.ravelry.com/projects/austingurl/creeper-afghan/edit?prepared=true