Create a new original English flash sale poster with energetic comic-book lettering.
Style: crisp outlined type, angular speed lines, ticket sparks, curved lightning shapes.
Layout: portrait 2:3 composition with a central title, today-only strip, discount burst, and action button.
Main text: "FLASH SALE", "TODAY ONLY", "UP TO 40% OFF", "SHOP NOW".
Language: English only; keep every phrase correctly spelled.
Design changes: use deep purple, aqua, bright yellow, cream, and black with new decorative angles.
Background: deep purple action backdrop with cream burst and aqua speed lines.
Remove: watermark, social handle, brand logo, QR code, website, author mark, and fine print.
Avoid: exact copying, original colors, random tiny text, misspelled text, and copyrighted brand elements.
