You will find many variations on this simple ripple stitch, but I like this simple ripple stitch because it eliminates holes or gaps. I wanted a very smooth look.
Chain a multiple of 12 and then add 3.
In the 4th chain from the hook, DC, then *DC in the next 3 chain spaces. Then, DC 2 times in the next chain and then do it again in the next CH space. DC into the next 3 spaces, in the next two spaces, you will combine 2 DC together.
Yarn over, insert your hook, pull up a loop, yo pull through two loops and STOP. Yarn over, insert your hook into the next space and pull up a loop, yarn over and pull through two loops, yarn over and pull through all the rest of your loops, THEN, do it again over the next two chain spaces. (You are creating a valley.) The abbreviation for this is DC2TOG.
Now, repeat the steps from the * until you get to the end. You should have one extra chain space left. Work 2 DC into that chain and turn.
For the second row and all remaining rows, chain 3 and turn. Work a DC into the first DC of the row below. Then repeat the pattern again from the *.
Hopefully this is simple and you’ll get into a great rhythm. Can I make a suggestion if you’ve never done this stitch before? Just do a practice chain of 36 + 3. Work the pattern back and forth before you tackle a big blanket. You’ll be able to see if the yarn works great with the hook you are using and figure out any mistakes.