I'm just trying to get a 3 flat rows in a row then 3 bumpy rows in a row.
Stockinette is what you get when you work a row of knit and then a row of purl and keep doing that sequence all the time (knitted flat). It is smooth with the little vees on one side and bumpy on the other.
Sometimes you want the bumpy side to end up on the right side of what you are doing, we call that reverse stockinette stitch (it is just the back side of the stockinette).
I believe you are wanting to do this, get three rows where the smooth side shows on the front and then get three rows where the bumpy side shows on the front. To do that work this way:
Row 1: Knit. (always have the yarn in back when you knit)
Row 2: Purl. (always have the yarn in front of the working needle when you purl)
Row 3: Knit.
Row 4: Knit. (this starts throwing the smooth side to the back)
Row 5: Purl.
Row 6: Knit.
Then go back to row 1 and repeat the 6 row sequence as many times as you want this to go on. You will have 3 rows of smooth, then 3 rows of bumpy on both sides.