Create a vibrant marketing poster background themed around a sale event. The design should feature bold, eye-catching colors like bright red, yellow, and green, with dynamic geometric shapes and patterns that convey excitement and urgency. Include playful elements such as starbursts or confetti to emphasize discounts and special offers. Integrate placeholders for text that can highlight sale percentages (like 50% OFF) and product categories. Add subtle textures like a gradient or brush strokes to give depth to the background while keeping it suitable for overlaying text and images.

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Create a vibrant marketing poster background themed around a sale event. The design should feature bold, eye-catching colors like bright red, yellow, and green, with dynamic geometric shapes and patterns that convey excitement and urgency. Include playful elements such as starbursts or confetti to emphasize discounts and special offers. Integrate placeholders for text that can highlight sale percentages (like 50% OFF) and product categories. Add subtle textures like a gradient or brush strokes to give depth to the background while keeping it suitable for overlaying text and images.