Rows 6, 8, 10, 12 and 14: Knit.
Rows 7, 9, 11 and 13: Purl.
Rows 15, 17 and 19: Knit.
Rows 16 and 18: Purl.
Rows 20, 22, 24 and 26: Knit.
Rows 21, 23 and 25: Purl.
Repeat from row 15 once more.
Crown: Rows 1 and 3: Knit.
Rows 2 and 4: Purl.
Row 5: Knit 2 together across.