Foundation: Multiple of 9ch + 2ch (acts as end htr).
Row 1: 1htr into 3rd ch from hook, htr into nxt 3ch, *3ch, sk 2ch, 7htr*, repeat from * to * to end finishing with 3ch, 4htr.
Row 2: 2ch (act as 1st htr throughout), htr into nxt 2 stitches, *3ch, 1htr into middle of ch sp, 3ch, sk htr, 5htr*, repeat from * to * to end, finishing with 3ch, 3htr.
Row 3: 2ch, htr into nxt stitch, *3ch, htr into ch sp, htr into single htr from previous row, htr into ch sp, 3ch, sk htr, 3htr*, repeat from * to * to end, finishing with 3ch, 2htr.
Row 4: 2ch, *3ch, htr into ch sp, htr into 3htr from previous row, htr into ch sp, 3ch, sk htr, 1htr*, repeat from * to * to end, finishing with htr.
Row 5: 2ch, 2ch, *htr into ch sp, htr into 5htr from previous row, htr into ch sp, 3ch, sk single htr from previous row*, repeat from * to * to end, finishing with 2ch, htr.
Row 6: 2ch, *3ch, sk htr, 5htr, 3ch, htr into ch sp*, repeat from * to * to end, finishing with 3ch, htr.
Row 7: 2ch, htr into ch sp, *3ch, sk htr, 3htr, 3ch, htr into ch sp, htr into single htr from previous row, htr into ch sp*, repeat from * to * to end, finishing with 3ch, 2htr.
Row 8: 2ch, htr, htr into ch sp, *3ch, sk htr, htr, 3ch, htr into ch sp, 3htr, htr into ch sp*, repeat from * to * to end, finishing with 3ch, 3htr.
Row 9: 2ch, 2htr, htr into ch sp, *3ch, sk single tr from previous row, htr into ch sp, 5htr, htr into ch sp*, repeat from * to * to end, finishing with 3ch, 4htr.
Repeat rows 2 - 9 to form pattern.