hand drawn doodle charcoal pencil curly lines, squiggly lines, chalk swirls, underlines

pencil scribble brush squiggle paint line doodle crayon charcoal marker hand drawn stroke zigzag scrawl rough mark abstract texture swirl wavy underline squiggly vector chalk coal curve thin grunge pen graphite scratch sketch design art black graphic paintbrush set smear background isolated illustration children graffiti element pattern brushstroke shape curly