Yes to the half square triangle suggestion by Scalloped. If you don't find this specific pattern, you can draw it out on graph paper using HSTs.
This is what I found doing a quick search. I think this is the pattern you are seeking.
Go to
https://www.youtube.com/watch?v=0OLrB7V_edc then scroll to about 7:25 minute and ta-da there it is in two colors. You can change the colors to match the photo you have.
I am sure that there are many other sources for this quilt pattern.