black. Other works mix long lines of red amidst the familiar black lines, creating a new sense of depth by the addition of a colored layer on top of the black one. His painting Composition No. 10, 1939–1942, characterized by primary colors, white ground and black grid lines clearly defined Mondrian's radical but classical approach to the rectangle. On 23 September 1940 Mondrian left Europe for New York aboard the Cunard White Star Line ship , departing from Liverpool. The new canvases that Mondrian began in Manhattan are even more startling, and indicate the beginning of a new idiom that was cut short by the artist's death. New York City (1942) is a complex lattice of red, blue, and yellow lines, occasionally interlacing to create a greater sense of depth than his previous works. An unfinished 1941 version of this work, titled New York City I, uses strips of painted paper tape, which the artist could rearrange at will to experiment with different designs. In October 2022 it was revealed that the work, which was first displayed at the Museum of Modern Art (MoMA) in New York in 1945, had been displayed upside down, since at least 1980, at the Kunstsammlung Nordrhein-Westfalen in Germany, where it is now held. The gallery explained that it would continue to display it the wrong way up to avoid damaging it. His painting Broadway Boogie-Woogie (1942–43) at the Museum of Modern Art was highly influential in the school of abstract geometric painting. The piece is made up of a number of shimmering squares of bright color that leap from the canvas, then appear to shimmer, drawing the viewer into those neon lights. In this painting and the unfinished Victory Boogie Woogie (1942–1944), Mondrian replaced former solid lines with lines created from small adjoining rectangles of color, created in part by using small pieces of paper tape in various colors. Larger unbounded rectangles of color punctuate the design, some with smaller concentric rectangles inside them. While Mondrian's works of the 1920s and 1930s tend to have an almost scientific austerity about them, these are bright, lively paintings, reflecting the upbeat music that inspired them and the city in which they were made. In these final works, the forms have indeed usurped the role of the lines, opening another new door for Mondrian's development as an abstractionist. The Boogie-Woogie paintings were clearly more of a revolutionary