Sock-Spring-KAL "Solco" Part 3

And it goes on...
2 rows coloured yarn and 2 rows single-coloured yarn in turn, altogether 20 rows

with the following pattern:

3 rows stocking stitches, 1 row purl stitches,
3 rows stocking stitches, 1 row purl stitches,
3 rows stocking stitches, 1 row purl stitches,
5 rows stocking stitches, 1 row purl stitches,
2 rows stocking stitches.