with slip stitch technique.
Cast on white, make some foundation rows (garter) then switch to a slightly larger needle (1 size up
2 rows of stocking knit.
drop white, pick up color.
K2, slip 1 (white) *K4, slip 1, (end with K2)
next row, work the CC (in purl) and slip the white stitch again, (repeat these 2 row once (4 rows total)
then pick up white and knit 2 rows of white.
next pattern row CC2
k4, slip1 (repeat across row) end with K4
purl the CC2, slip the white..
(2 more rows)
then back to 2 rows of white.
and then on to CC3, (and the same pattern as CC1)
then CC1 (in row pattern of CC2!)
and so on.
slip stitches are a great way to create a complex looking pattern,and still just use 1 yarn per row.
there are LOTS of slip stitch patterns.. (I LOVE THEM)
they do play havoc with gauge, and they frequently don't want to lie flat (they have a corregated texture.. and won't block to a flat fabric... but that is part of their beauty.. you get texture and color!)
On my blog, i have the directions for tri color linen stitch.. IT LOOKS hard, but its easy as pie!
this same pattern is used in Mason Dixon's book for a wash cloth and they call it the Ball band pattern (since they found it on a cotton yarn ball band!)--but its more commonly called a brick pattern.