I’m looking for a book published between 1980 and 1995. It’s about 4 girls representing the 4 elements (air, water, fire, earth). It’s told mainly from the point of view of the fire element, I believe. She might be called the fire brand but I’m not sure. The girls have to connect and retie the knot of elements that is holding the earth. There is a very vivid description of the knot, and the four colors of the cords making it. This book might be part of a series and it might be considered young adult.