Lisas,
In the pattern they tell you to bind it with the Hot Pink Binding. If you do not want to do that, then I would make an "envelope". Sew the right sides together, leaving enough space to turn your quilt right side out. You need to iron/press the edges smooth, which can be a bit of a challenge. Then you need to stitch the opening left from turning closed.
Then you could go ahead and tie off your quilt. Usually people tie at all of the corners, however in this quilt the corners are not symmetrical, so you may want to create your own pattern in your ties.
Good Luck & Happy quilting.
Susan