Sol LeWitt is a conceptual artist, mostly drawing and scultping very simple geometric forms. Check out a Google Image Search. A retrospective of his wall drawings is on view at Mass MoCA (the Massachusetts Museum of Contemporary Art, in North Adams in the state’s northwestern corner). Don’t rush, it’s on view until 2033.
I’m not going to comment – not being an art critic – but if your brain works like mine you will spend some time looking at these.