Chain multiple 6 +2.
Row 1 (RS): Begin from the 2nd chain from the hook, SC in next st. *Skip next 2 sts, 7DC in next st (Shell stitch). Skip next 2 sts. SC in next st. Repeat from * to end of row.
Row 2 (WS): Ch5 (counted as a DC and 2 chains), turn. *Skip first 3DC of the Shell stitch in the previous row. SC in the 4th DC of the Shell. Skip next 3DC of the Shell stitch. Ch2. DC in next SC. Repeat from * to end of row.
Row 3: Ch3, turn. 3DC in next st. Skip next 2 chains. SC in next st. *Skip next 2 chains, 7DC in next st. Skip next 2 chains. SC in next st. Repeat from * to last ch-5. Skip next 2 chains. 4DC in next chain.
Row 4: Ch2, turn. Skip 4DC of the half Shell stitch. DC in next SC. *Ch2. Skip first 3DC of the Shell stitch. SC in the 4th DC of the Shell. Skip next 3DC of the Shell stitch. Ch2. DC in next SC. Repeat from * to end of row.
Row 5: Ch1, turn. SC in next st. *Skip next 2 sts, 7DC in next st (Shell stitch). Skip next 2 sts. SC in next st. Repeat from * to end of row.
Repeat from Row 2 to Row 5.