Bortnyik Sándor, 

This abstract artwork by Hungarian artist Sandor Bortnyik, created in 1923, is a prime example of Constructivism. The piece consists of a network of bold lines and curves, forming geometric shapes and patterns. The use of black outlines and a palette of yellow, green, and blue creates a sense of dynamism and rhythm. The abstract nature of the artwork allows for diverse interpretations, inviting the viewer to engage with its formal qualities and explore its abstract expressions.