Starting chain 42

1: 41 BLOSS
2 (and all even rows): BLOSS
3: 10 stitch brim, 3 repeats -1 stitch (final 2 left unworked on odd rows unless otherwise stated) {39}
5: 5 stitch brim, 3 repeats +2 {37}
7: as even row {35}
9: 5 stitch brim, 3 repeats -2 {33}
11: 10 stitch brim, 2 repeats +1 {31}
13 (replaces row 1 for repeat): as even row, SS in previous 10 unworked stitches to increase {41}

Work 10 repeats

After 9th time to row 13 connect with zip stitch