SeaShells

Techniques used:
modular - the stitches for the new motifs are picked-up from the existing ones. There is no sewing.
slipped stitches (easy)
decreases, centered and stacked (again, easy)
short rows, for the top only (do I have so say it again? - easy).
This pattern is memorizable and easy to work. The main challenge is weaving in ends, which should be done as you go. And, because there are lots of ends, I strongly suggest to use yarn that has some natural grip. In that case all remaining tails can be cut really close to the knitted fabric, and the wrong side will look neat. Slippery yarn just ….well, slips. You weave it in, and it weaves out…
I don’t see ANY edging here at all, maybe just a couple of simple stripes along V-sides, but no more).
I used three colors, blue, brown and white; and that’s how the pattern is written. However, it would have been much faster and easier to knit with just two colors. The work order in that case would have been a little different, but there would be no need to break MC yarn - the last remaining stitch from the motif just becomes the first stitch of the new one (on the left side).
A little more about the colors. MC should be solid, or maybe mottled or speckled. I wouldn’t suggest using any gradient, even slow gradient. For the “shells”, on the contrary, any crazy sectional, or even selfstriping (well, that depends) yarn would work just fine.