You'll need medium worsted weight yarn (yarn category "4") in three different shades - light (Color A), medium (Color B), dark (Color C). For this one I used Red Heart Super Saver yarn. I don't remember what the exact colors were called, but I used not quite a full skein of each in white, light dusty rose, and dark rose. I used a size I crochet hook.
Abbreviations: Ch = chain, sc = single crochet, dc = double crochet
With Color A, ch 100.
(Ch 65 for 18" long premie or doll afghan. Ch 118 for 42" long baby afghan.)
Row 1: 2 dc in fourth ch from hook, skip 2 ch, sc in next ch, *ch 2, 2 dc in same ch as last sc, skip 2 ch, sc in next ch. Repeat from * across.
Row 2: Ch 3, turn. 2 dc in last sc, sc in next ch-2 space, *ch 2, 2 dc in same ch-2 space, sc in next ch-2 space. Repeat from * across.
Rows 3-4: Repeat Row 2.
Row 5: Change to Color B. Repeat Row 2.
Row 6: Repeat Row 2.
Row 7: Change to Color C. Repeat Row 2.
Row 8: Repeat Row 2.
Row 9: Change to Color A. Repeat Row 2.
Row 10: Repeat Row 2.
Row 11: Change to Color B. Repeat Row 2.
Row 12: Repeat Row 2.
Continue repeating Row 2, working 2 rows of each color in stripe sequence established (Color A, then B, then C) until afghan is about 2" less than desired width, ending with Color A. Work 3 more rows with Color A. Fasten off, weave in ends.
Turn afghan around and join Color A with a sc in last sc (on the opposite side of the beginning chain). Ch 2, 2 dc in same sc, sc in next ch-2 space, *ch 2, 2 dc in same ch-2 space. Repeat from * to the end of the row. Fasten off, weave in ends.
If you make this afghan I'd love to see a picture of it! If you have any questions please let me know.