While many of my paintings have a free overall pattern, or a central focus, sometimes I begin a painting with an underlying grid pattern. Once this is set up, I like to work against it with a play between formality and informality.
In my latest abstract painting, I started with vertical bands of paint. In this session, I emphasized the horizontal, which led to the grid pattern.
Canvas #121, 48" x 48" acrylic on canvas.Now I have a structure I can begin to play against.