I have finished the border for one side.
This is what I did for row 3.
K1,increase in same st, yfwd then k2tog. When you reach the last 3, yfwd k2tog, increase one, then knit last st.
For row 5 and 6 knit with the main color, then switch to your contrast for rows 2,3,4,7.
It comes out as a “lace pattern” with 2 rows of (main color) stockinette st. between.
Let me know it you would like a close up of the finished pattern.
Hope this helps.