Robert Delaunay — French Artist born on April 12, 1885, died on October 25, 1941

Robert Delaunay was a French artist who, with his wife Sonia Delaunay and others, cofounded the Orphism art movement, noted for its use of strong colours and geometric shapes. His later works were more abstract, reminiscent of Paul Klee. His key influence related to bold use of colour, and a clear love of experimentation with both depth and tone... (wikipedia)

But what is of great importance to me is observation of the movement of colors.
Vision is the true creative rhythm.
Nature engenders the science of painting.
Painting is by nature a luminous language.
Light in Nature creates the movement of colors.