With color A knit 1 row.
Repeat Rows 1 - 4
Row #SideColorBegin RowRepeatRepeat From *End Row
1RBk1*sl 1 wyib, p3*sl 1, k1
2WBk1*sl 1 wyif, k3*sl 1, k1
3RAp3*sl 1 wyib, p3* 
4WAk3*sl 1 wyif, k3* 
Row: 4  
  Row: 3
Row: 2  
  Row: 1