Acrylic on canvas 

This abstract piece by Sam Francis is a stunning example of his signature style, characterized by bold, vibrant colors and gestural brushstrokes. The artist's use of thick, flowing lines creates a sense of energy and movement, while the dominance of white space emphasizes the fluidity of the colors. Francis's paintings often explore themes of light, space, and color, inviting viewers to engage with the emotional and psychological impact of his work.