squiggle lines seamless pattern. pen freehand doodles, black strokes on white background. tileable abstract

abstract amplitude art background black chaos chaotic concept crazy curl digital doodle drawing drawn edge freeform freehand geometric illustration ink line marker miscellaneous modern monochrome pattern pen pencil ripple scratch scrawl scribble seamless sharp simple sketch squiggle squiggly stroke swirl tension texture thread vector wave wavy white wiggle wiggly