abstract background carpet divan Duck-board floor pattern roll rug soft texture backdrop colors decoration decorative desktop shapes structure structures textures wallpaper air backgrounds bubble bubbles color colour colours micro microscope powerpoint prism prisms refract refraction sveres backgrounds[ abstract graphic art blue fill geometric grunge illustration modern original pastel pink pop art rounded scrapbooking triangles purple beige yellow abstract design concrete construction design grungy marble patterns gray slab stone surface urban urban texture wall white concept curves futuristic graphic render ripples speed vector water waves