Casting off in pattern

I’m working in seed stitch pattern, and it says to cast off in pattern. so, do i knit the knit stitches and purl the purls or purl the knits and knit the purls? any help?

knit the purls and purl the knits.

Thank so much for all of your help.

You’re very welcome. I just finished a top with the same bindoff on a seed stitch border.