With red yarn, ch 101.
Row 1: Sc in second ch from hook, and in each ch across (100 sc), ch 2, turn.
Row 2: Hold end of clothesline next to rug, sc around clothesline in each sc across (see Diagram 1). Ch 1, turn.
Row 3: Sc in each st across (100 sc). Change to orange (crocheting over yarn ends) and repeat these three rows in the following order: yellow, light green, dark green, blue, and purple. Repeat these 21 rows six times more, or for length desired; fasten off.
Splicing clothesline (if necessary): Unravel 1-1/2 inches on end of each piece. Cut out half the ply of each piece, and overlap. Secure with dot of glue to each end and wrap splice with matching color of sewing thread (see Diagram 2).