Next up: Agnes Martin.
She gets called a minimalist, she considered herself an Abstract Expressionist. To her, the paintings expressed her deep spirituality, based on the Zen master who was influencing many of the artists of the time, D. T. Suzuki (I think).
The Guardian has a more complete biography of Agnes Martin (1912-2004). One of her recurring forms was a grid, taking up all the space on the painting surface. There are a zillion ways to produce a grid!
I appreciate her life story.
Here are my efforts:
"Not knowing how to do it is part of knowing how to do it." - Leon Kossoff 
impressive! nailed it. was it fun? she’s new to me so glad to be introduced thanks
thank you! I really recommend the Guardian article.