Ribbed 2-color brioche insert can be used between edge stitches or other pattern stitches.
Row 1 = 1 LS LC Row 2 = 1 LS DC Row 3 = 2 DS LC Row 4 = 2 DS DC
Shown with a cast-on count of 4 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats