Cyberpunk_halloween: A highly detailed digital illustration featuring a big neon sign that says "Cyberpunk Halloween." The sign glows with vibrant neon colors, including purples, greens, and electric blues, surrounded by glitching particles, swirling fog, and holographic flickering effects. The entire scene creates a futuristic and eerie atmosphere, with the neon letters glitching and flickering, casting an ominous glow in the foggy, cyberpunk-inspired environment. Metallic textures and digital elements enhance the eerie ambiance.