Avoid any complex or detailed elements in the image that would ruin the minimalist and zen quality of the design. Avoid any blurriness, pixelation, or noise in the image that would reduce the resolution and quality of the design. Avoid any distortion, disproportion, or inconsistency in the features and proportions of the circle that would make it look unrealistic or unappealing. Avoid any dull, faded, or unnatural colors that would ruin the ink and paper mood of the design. Avoid any clutter, distraction, or irrelevance in the background that would take away from the focus and interest of the design. Avoid any multiple or incomplete circles that would make the design hard to print or view on a phone screen.