Do you know how to do a 1x1 ribbing (k1, p1)? And how you are supposed to k the k's an p the purls as the piece faces you?
Now with seed stitch you do the opposite, it's still k1,p1 but now you k the p's and p the k's. And you have seed stitch. And this is AS the stitches are facing you. Don't worry bout what you did on the last row, that's ancient history.