image provided by Elaine Joann Lyons

 

Work on circular needle or a pair of double point needles. If worked on a circular needle, it is unnecessary to sl sts to other end of needle.
Cast on with Color A then join Color B.
At the ends of Rows 2 and 4: Make sure to always take up strand B. Color A always follows color B across the rows, after the sts are slipped to the other end of the needle.
Repeat Rows 1 - 4

Row #SideColorRepeatEnd Row
1RBk1, sl 1 wyifsl sts to other needle and take up color A
2WAsl 1 wyib, p1Turn work and take up color B strand
3RBsl 1 wyib, p1sl sts to other end of needle and take up color A
4WAk1, sl 1 wyifTurn work and take up color B strand