use black and gray colors, make the pattern be slow, add a pinch of water ripple effect Increase ripples

edit

Fractal Patterns

edit

use black and gray colors, make the pattern be slow, add a pinch of water ripple effect Darker shades

edit

concentric rings Add transparency

edit

use black and gray colors, make the pattern be slow, add a pinch of water ripple effect Contrast increase

edit

Radial Symmetry

edit

edit

edit

weird red Symmetrical Patterns

edit