How to work a nice and easy bubble pattern

In this DROPS video we show how to work a nice and easy bubble. We have already cast on 14 + 2 stitches, knitted 1 row and start the video like this:

1 ROW (RS): Knit 1 edge stitch, * 1 yarn over, knit 2 twisted together, 1 yarn over, do not slip the stitches off the left needle, but knit 1 more time in the same stitch = 4 stitches on the needle (+ edge stitch), slip the stitches of left needle *, repeat * - * entire row and finish with knit 1 edge stitch = 28 stitches / yarn over + 2 edge stitches on needle, turn.
2 ROW (WS): Knit 1 edge stitch, purl 2 and 2 stitches together and finish with knit 1 edge stitch.

Repeat row 1 and 2 to the desired length.
We use the yarn DROPS Snow in the video.