Knitwear density: 17 stitches x 28 rows = 10×10 cm.
At the beginning of rows 23,27, 31, 35, 59, 63 and 67, change the position of the marker from the beginning of the row.
The last stitch of previous row is passed on left knitting needle, fix the marker, then pass the stitch on right knitting needle.
Knit three rows with all stitches back. In the next row close all the stitches.