Help with knitted penguins

Hey I’ve just started knitting some penguins but cannot understand the instructions any advice would be great.
ROW 21(rs): K1,M1, k to last stitch, M1,K1. 22sts
ROW 22: purl.
Working all incs as set by last row, inc 1 St at each end of 3rd row, then on 3 foll 4th rows. 30 sts.
Work 1 row ending with RS facing for next row
Row 39

Thank you for any help