URL：https://get.pxhere.com/photo/texture-pattern-line-green-color-macro-office-brown-paint-black-colorful-yellow-paper-close-font-grey-papers-background-design-text-maze-stationery-school-draw-shape-tinker-datailaufnahme-macro-photo-1015788.jpg
掲載元：https://pxhere.com/ja/photo/1015788
