Create a retro-themed poster background with a dark, deep purple or navy color

Create a retro-themed poster background with a dark, deep purple or navy color. Add a few neon elements, such as glowing geometric shapes, grid patterns, and retro items like cassette tapes, vinyl records, and arcade machines. Use bright neon colors like pink, electric blue, and neon green. These elements should be sparsely placed around the edges, not too crowded, leaving a large empty space in the center for text. The overall design should evoke the 80s with a fun, energetic feel, but maintain a clean and balanced look.