I wouldn’t trust the image generator with text or lines. Try simpler concepts like scenery, single objects.
See also 🔥 App Spotlight: OpenAI 'Generate an Image'
If you want to place your logo or own text, I suggest using something like Google Slides with your text already placed, Upload an Image to a presentation, and Get a Page/Thumbnail
Output image from last module:
lh3.googleusercontent.com/docsdf/AOUlruTRxMApNaaJ8EkU0wNUrgJ3fSxt7dqbzwdiTu21JAimrqK1kXujU5LkrSBU6SbVpBRdNtmjxCtcvbpvEe_UzwskdPhC07oL5m6G68sgKCzfiIHod8_mpV3OrDZh0xdsK596GLenXyyEQS_BVmshUcx2-IblxdsrOZzgmguGSuE=s1600