This prompt can generate a modern beautiful illustration based on any Keyword. The only limit is your imagination. Write the prompt and insert your preferred Keyword so Midjourney can use its imagination to give your desired result.

Sunset Vintage. retro sunset vintage old design for background t-shirt, POD, book cover and other Print on demand retro sunset vintage: retro, design, vintage, sun, sunset, t-shirt, old, pod, book cover, shirt --ar 4:5 --v 5.2