Create a brand-new vertical weekend summer promotion poster in English, intended for advertising and marketing.
Accurately present the text “WEEKEND SUMMER SALE”“FRIDAY 20% OFF”“SATURDAY 30% OFF”“AUGUST 28-29”.
Adopt a high-contrast color scheme of cobalt blue, orange, creamy white, and lime green.
Place an unbranded megaphone in the lower-left corner, accompanied by an arched sound-wave paper ribbon.
Use two large coupon labels to highlight Friday and Saturday offers.
The headline and discount information must be large and clear, suitable for mobile viewing.
Do not include any brand logos, trademarks, website URLs, QR codes, watermarks, or fine print.
Output a high-quality static PNG image.
