six-level sierpinski carpet fractal (anno 1916), an endless pattern of squares within squares towards infinity, with each square iteratively divided into nine, leaving the center one empty. - 底片式圖像 幅插畫檔、美工圖案、卡通及圖標
antique illustration, physics principles and experiments, optics: positive and negative image - 底片式圖像 幅插畫檔、美工圖案、卡通及圖標
business card . name, phone, mobile, place, location, mail, website and message card sign. communication symbol design template. - 底片式圖像 幅插畫檔、美工圖案、卡通及圖標
cyanotype style botanical art print of persian lily, fritillaria persica, flowering plant, from hortus floridus by crispin de passe, vintage illustration, 17th century. a robust bulbous perennial with conical, narrow, bell-shaped flowerscyanotype style bo - 底片式圖像 幅插畫檔、美工圖案、卡通及圖標蝴蝶, 復古風格
