This is a good pattern to use for the little bits of leftovers from other projects. You use the leftover yarn as your contrasting color and you will have some wonderfully interesting hills in your socks.
What you'll need.
2 balls of main color of Vinnie’s colours yarn
2 balls of contrasting color of Vinnie's colours
Size 3 us(3.25mm) double point needles (Type of needles for preferred method)