To keep the quilt as original as possible, I would like someone else said,try to match the colors and, applique. measure the squares add 1/4 " for turning under, then draw the turquoise piece on a large piece of paper cut the piece a 1/4 inch all around press seam allowance under and place over the original and applique in place, secure the ragged edges of the large tear.or use piece of flannel cut like the piece just drawn and secure over sections to be repaired. if done right the only difference will be the color. you will never get the same color.