retro futuristic background with sky and palm trees. retrowave and synthwave style of tropical sunset and palms.

1980s 80s abstract background banner california cover design digital electronic fiction flyer future futuristic game glow glowing gradient graphic grid horizon illustration light mesh moon neon night palm palms pink poster retro retrowave science scifi shine shiny silhouette sky star style sun sunset synthwave techno technology tree trees trendy tropical universe vector vibrant vintage wave wireframe