Love what you have done so far. It is going to be a beautiful quilt. You could put another row of sashing around the blocks not sewn together. Maybe a green around the gold color ones & gold around the green ones. It also looks as if maybe your green ones are bigger than your gold ones? If so, put an extra wide sashing around the gold blocks & then square them up to the same size. You could also add a row all the way around with a square in a square on point & put the dark border in between these rows of blocks. This would increase both length & width then add another wider final border.