Prompt: Design an icon for a music app focused on challenges. The icon should prominently feature the letter 'W' and utilize the colors #1DB954 (bright green) and #191414 (dark shade). The design should be modern and dynamic, embodying the spirit of music and competition. The 'W' could be stylized to reflect sound waves, musical elements, or competitive flair. The green should be used as a vibrant highlight against the darker background, creating a striking and eye-catching contrast. The overall look should be sleek, easily recognizable, and convey the exciting nature of the music challenges within the app.