grisly charcoal scrawls, rough brushstrokes, circles, underlines, charcoal stripes, and ink s. cartoons or markers

texture brush paint shape line background abstract design frame brushstroke stripes art squiggle pen underline emphasis scrawl hand illustration scribble black grunge wave curve scratch pastel ink collection blackboard graphic doodle stroke crayons graffiti rough bold marker freehand vignetting graphite signs element charcoal chalk drawn ai generated