Crochet hook size G
Several colors of soft 4 ply worsted yarn (about 20 oz yarn total)

Baby Sized - Chain 152  
ROW 1: 2 sc into 2nd ch from the hook.  *Sc into next 6 ch, skip 2,  sc into each of next 6 chs, 3 sc into next ch, repeat from * 8 more times.  Sc in next 6 ch, skip 2, sc in next 6 ch, 2 sc in last ch.  Ch 1, turn. (RIGHT SIDE) 

Row 2: from now on sc in the back loop of each stitch.  2 sc in first sc, *sc in each of next 6 sc, skip 2 sc, sc in next 6 sc, 3 sc in next sc (which should be the middle of the 3 sc of row 1). Repeat from * 8 more times.  Then sc in next 6 sc, skip 2, sc in next 6 sc, 2 sc in last sc, ch 1 and turn. Repeat row 2 for the entire afghan. 

Repeat Row 2 throughout.  Finished blanket should measure about 4' long or desired length. Change colors after every 4 rows or so. This is a very flexible pattern. 
I have seen ripples with color changes mid-row.... just depends on the look you want.