Prompt: (masterpiece, best quality:1.1), (round logo:1.05), no humans, a sleek sports car, aerodynamic design, fast, car focus, black, racing track, gradient background, simple background
Negative prompt: (worst quality, low quality:1.3), lowres, monochrome, blurry, artist name, signature, watermark, english text, web address, 1girl, 1boy