I think this is one of my favorite squares so far! The pattern can be found here. It made me think of fireworks and I just had to do it in red, white, and blue. I love how it turned out. Though if I did it again I’d probably just do the white either at the center or on the edging. It kind of breaks up the lines and makes their continuity hard to see.
I love working with cable stitches or post stitches. This square is made with front post double treble crochets.