Create an image in naive-marker-psa-poster-style.
Aspect ratio: 9:16.
Scene: A group of cheerful neighborhood volunteers (three simplified cartoon people, one tall, one short, one with a big round head) are holding up a tiny sapling in a pot with oversized hands, featuring an oversized green sapling with a big floppy leaf crown, a wobbly shovel, and a watering can, in a small community park corner with a freshly dug planting hole. Include flat tiny buildings, wooden stake signs, arrows pointing down to the soil, grass tufts, small rocks, paper plant labels, little sprout doodles, alert marks, watering droplets, and paper scraps. Style the characters with simple volunteer outfits: flat coral red and marker blue T-shirts, yellow gardening gloves, green aprons, and bucket hats.
Illustration: make a finished raster poster, not a photo, SVG, UI mockup, or clean vector icon set. Use thick uneven black marker outlines, flat hand-colored fills, rounded stroke ends, subtle paper grain, marker scuffs, imperfect edges, and low-polish scanned-poster softness.
Layout: reserve the upper half or upper band for a huge rounded speech-panel sign with a thick marker-blue border and off-white interior. Put "PLANT A TREE TODAY" inside the sign as massive rough black block letters. Add "WORLD TREE PLANTING DAY" as a small rounded red capsule label near the headline.
Characters and setting: place one or more simplified cartoon people in the lower half with playful scale distortion, oversized hands, signs, or props, and intentionally naive proportions. Build the environment from flat doodled public-scene icons: tiny buildings, signs, cones, grass tufts, arrows, rocks, labels, alert marks, and simple yellow ground patches.
Color and mood: use pale blue background, cream panel, marker blue frame, coral red accents, warm yellow ground, soft skin pink, grass green, chalk gray, and deep black ink. Keep the poster friendly, instructional, childlike, approachable, and lightly comedic. Include a sprout burst as a simple graphic accent.
Avoid: watermarks, usernames, creator IDs, platform logos, QR codes, app UI, signatures, copied reference text, copied reference characters, red telephone, legal theme, date range, no-access sign, exact layout, brand logos, licensed characters, recognizable people, photorealism, 3D render, glossy vector art, clean corporate icon set, gradient lighting, airbrush shading, thin elegant line art, realistic anatomy, correct architectural perspective, long paragraphs, dense fine print, and dark cinematic mood.
--- NEGATIVE PROMPT ---
watermark, username, creator ID, platform logo, QR code, app UI, signature, copied reference text, copied reference characters, red telephone, legal theme, date range, no-access sign, exact layout, brand logo, licensed character, recognizable person, photorealism, 3D render, glossy vector art, clean corporate icon set, gradient lighting, airbrush shading, thin elegant line art, realistic anatomy, correct architectural perspective, long paragraphs, dense fine print, dark cinematic mood
