Scarf with polka dots

A simple and effective model, decorated with polka dots.
Length: 200 cm, width: 18 cm.
Necessary materials:
3 skeins of thick thread (100% wool, 100g/160m);
Andrele no. 6.

Knit density: 17 stitches x 22 rows = 10 x10 cm.

Polka Dot Scarf Knitting Explanation:
Cast on 25 stitches and knit as follows:
Row 1 and all rows purl: 6 front stitches, 1 back eye, (5 front stitches, 1 back eye) x2, 6 front stitches.
Row 2 and row 4: All front stitches;
Row 6: 12 front stitches, 1 badge, front all stitches until the end of the row;
Row 8, 10, 12 and 14: All front stitches;
Row 16: 6 front stitches, 1 badge, front all stitches up to the last 7 stitches, 1 badge, front all stitches until the end of the row;
Row 18 and 20: All front stitches;
Repeat rows 1-20 until the length of the scarf will measure 200 cm. the last row will be row 12, front row. In row 13 all stitches are closed.

How to knit the badge:
Knit 1 knit stitch, the work returns. From the knit stitch in the previous row is knit 3 purl stitches. The work is coming back, from behind those 3 stitches are knit by 1 knit stitch = 6 stitches. The work is coming back, 6 purl stitches. The work is coming back, from behind those 6 stitches are knit by 1 knit stitch = 12 stitches. The work is coming back, 12 purl stitches. The work is coming back, 12 stitches face. The work is coming back, 12 purl stitches. The work is coming back, (2 stitches together front) x 6 = 6 stitches. The work is coming back, 6 purl stitches. The work is coming back, (2 stitches together front) x 3 = 3 stitches. The work is coming back, Purl 3 stitches. The work is coming back, 3 stitches together front = 1 stitch.