Simple techniques can give simple pleasures.  Here is a very pleasing colour combo and texture using my old trusted stretchy rib. Pick a multiple of three stitches and add two stitches (for one stitch edge on each side), then repeat as follows: K1(edge), *K2, P1* to last stitch, K1(edge). This is reversible so perfect for a scarf. Repeat the same pattern for every row until desired length. Simple!

I am using scrap yarn doubled up (black with bright blue/ grey with pale blue) on fairly large 6.5 mm needles. This works up quickly for a variegated and chunky finish.

Happy knitting!