"A vibrant, retro-style sunset with bold, horizontal gradient lines in shades of

"A vibrant, retro-style sunset with bold, horizontal gradient lines in shades of orange, yellow, pink, and purple, forming a semi-circle. In front of the sunset, add solid black silhouettes of palm trees swaying gently in the breeze, with a few birds flying above. Frame the entire design with a geometric shape, like a circle or triangle, that has a bold white outline around it to ensure the design stands out and is unaffected when the background is removed. The overall aesthetic should evoke a nostalgic, vintage beach vibe.