abstract architecture background backgrounds cover house orange pattern patterns roof roofing structure structures texture textures tiles top athletics blue championship competition field floor ground lane movement red run running sports tartan track abstraction black colour colours cyan green microbes microcosmos pink white yellow art paint artist bib bib clothing coveralls fabric paint painted painter protection smudge splatter work clothing construction general iron light metal metallic pile shadow shadows square squared squares autumn backdrop blank collage fall handmade leaf leaves natural nature paper papier series variation variations