dotted spiral . stippled thin helix. sand grain texture swirl or twirl . dot work spin

spiral grain dot work stipple snail helix twist vortex abstract art black circle circular concentric curve cycle design dust effect element geometric geometry glitter grunge halftone hypnosis hypnotic illusion illustration line noise optical psychedelic radial round sand shape swirl symbol template texture thin trance twirl vector vertigo whirl whirlpool white