Brick Stitch Pattern. Make the chain of foundation, and three extra chains to turn.
Row 1. Work 3 D.C. in 4th ch. from hook. * Skip 3 ch., 1 S.C., 3 ch., and 3 D.C. in the next ch. Repeat from * across row, and end 1 S.C.
Row 2. Ch. 3 and turn. Work 3 D.C. in the S.C. of previous row. * 1 S.C. in the space made by ch. 3 of previous row, ch. 3, and 3 D.C. in same ch. 3 of previous row. Repeat from * across row. End with 1 S.C.
Repeat Row 2 throughout.
Source: Complete Guide to Modern Knitting and Crocheting