Necessary:
needle n. 7
2 ball of yarn
Let’s go.
Cast on 56 st with color A
Place a marker
Knit 5 row at rib 2/2 (2 knit, 2 purl)
Knit 1 row with col A
Now:
Row 1 – “5 K col A, 1 K col B, 1 K col A, 1 K col B” repeat the sequence until the end of row
Row 2 – “4 K col A, 1 K col B, 1 K col A, 1 K col B, 1 K col A” repeat
Row 3 = Row 1
Row 4 = Row 2
Row 5 – “1K col B, 1 K col A, 1 K col B, 1 K col. A, 4 K col B” repeat
Row 6 – “1 K col A, 1 K col B, 1 K col. A, 5 K col B” repeat
Row 7 = Row 5
Row 8 = Row 6
Repeat all, from Row 1 to Row 8
Now:
Row 17 – “1 K col A, k2tog col A, 2K col A, 1K col B, 1 K col A, 1 K col B” repeat
Row 18 – “3 K col A, 1K col B, 1 K col A, 1 K col B, 1 K col A” repeat
Row 19 – “1 K col A, k2tog col A, 1 K col A, 1 K col B, 1 K col A, 1 K col B” repeat
Row 20 – “2K col A, 1K col B, 1 K col A, 1 K col B, 1 K col A” repeat
From now only col A
Row 21 – “1K, k2tog , 2 K” repeat
Row 22 – “1K, k2tog ” repeat
Row 23 – “k2tog ” 
Cut the yarn and pass by the st, stretch and sew the yarn on behind
Finish