Suprematism

Kasimir Malevich founded a style called Suprematism.  It is often referred to as "Cubo-Futurism" as well.  He sought only “expression of feeling, no practical value, no pre-conceived ideas”. He rejected utilitarian function and pictorial representation. Malevich refused the idea that art should take part in political activism (Meggs).

Kasimir Malevich Black Square, 1913

When Malevich died, this painting hung above his casket.  He specifically painted something for which he would not be distracted, which did not need to be represented by anything else.