Subject: Traditional football in classic black and white patchwork style, located at the visual center of the画面, realistic shape. Scene: Green flat background with vertical stripe texture, presenting the texture similar to football field lawn, with granular printing halftone dot effect, no text. Style: Retro halftone printed poster style, with granular halftone dot texture, having the eye-catching feeling of sports posters. Tone: Overall based on different levels of green background tone, matched with the classic black and white color of the football, bright and full of vitality. Lighting and shadow: The football has natural soft shadows, highlighting three-dimensionality, the light is even and soft, in line with the visual performance of flat posters. Composition: The main football is placed in the lower middle area of the画面, text elements are distributed around the football, the overall composition is full and clear in layers, with strong visual guidance. Purpose: Promotional poster for football-themed activities, used to create a lively atmosphere for sports events, attract the attention of the target audience.