This free pattern originally published by Coats & Clark in Afghans and Matching Pillows, Book 505, in 1954.

Each motif measures 4 inches in diameter.
Afghan measures 40 x 60 inches
CHADWICK'S RED HEART KNITTING WORSTED, 4 Ply, Art. E. 232:
24 skeins (1-oz. "Tangle-Proof" Pull-out Skeins) each of No. 1 White and No. 737 Pink.
Plastic Crochet Hook No. 5.
MOTIF (Make 160) . . . Starting at center with Pink, ch 6. Join with sl st to form ring.
1st rnd: Ch 3, dc in ring, holding back on hook the last loop of next dc, make a dc in ring, drop Pink, draw a loop of White through 2 loops on hook, thus changing color--always change color in this manner--working over unused color make 3 dc in ring, drop White, pick up Pink, working over unused color make 3 dc in ring. Continue in pattern until 3 groups of each color (18 dc) have been completed, ending with a White dc. Join to top of ch 3.
2nd rnd: With Pink, sl st in next dc, ch 3, dc in same place (1 dc increased), 2 dc in each of next 2 dc, * change color, 2 dc in each of next 3 dc. Repeat from * around. Join.
3rd rnd: With Pink, sl st in next dc, ch 3, dc in same place, * dc in next 4 dc, 2 dc in next dc, change color, 2 dc in next dc. Repeat from * around. Join and break off.
To Join Motifs: With wrong side facing, sew motifs together, joining half a White section and half a Pink section to corresponding sections on next motif. Join all motifs in this manner, making 6 rows of 15 motifs and 5 rows of 14 motifs and following diagram. Block to measurements.

Other great patterns from Afghans and Matching Pillows, Book 505:
Blue Diamond Afghan
Candy Cane Afghan
Checkmate Afghan
Chevron Afghan
Honeycomb Afghan
Jacob's Ladder Afghan
Lazy Daisy Afghan
Lollipop Afghan
Maltese Cross Afghan
Mardi Gras Afghan
Navajo Afghan
Patchwork Afghan
Peacock Afghan
Pennsylvania Dutch Afghan
Polka Dot Afghan
Shaded Stripes Afghan