Prompt: (masterpiece, best quality:1.1), (round logo:1.05), no humans, a rainbow with bright colors, curved arch, blue sky, meteorology, beauty, light, hope, spectrum, reflection, 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