With A, cast on 43 stitches.
Row 1: With A, knit.
Row 2: With A, purl.
Rows 3 and 4: With A, rep Rows 1 and 2.
Rows 5 and 6: With B, rep Rows 1 and 2.
Rows 7 and 8: With C, rep Rows 1 and 2.
Rows 9 and 10: Rep Rows 5 and 6.
Rep Rows 1-10 until piece measures about 9 in. (23 cm) from beginning.
Fold piece in half horizontally. Seam side and lower edge.
Cut a 45 in. (114.5 cm) length of C; fold in half. Secure folded end around doorknob. Twist other end until taut and yarn begins to twist back on itself. Release end from doorknob. Bring ends together and let cord twist on itself, smoothing to even the twist. Knot ends. Pin a large safety pin to one end of cord and weave through Pouch about 2 in. (5 cm) below top edge.
With A and B, make 2 small pom-poms. Sew a pom-pom to each end of cord.
Weave in ends.