The first bead of each stitch will kind of pop up, and lie between the upright beads.
You can leave the stitch as is, or it's easy to use as a base for more beads. In the purple and green example I added a couple of green beads between every horizontal bead. In the red example I used size 6 beads.
Here I kept going, and added 5 size 11 beads, after adding a peach size 8 bead between each horizontal triangle bead. As long a you add an uneven number of beads, you can build outward in net stitch .
I have embellished everything from clothing to beading mats with this stich. It works up quickly, especially in the larger beads.