a set of squiggly brush strokes and curly lines, hand-drawn in a wave-like doodle pattern with charcoal and ink

brush line stroke squiggly paint curly doodle hand swirl scribble wave drawn squiggle ink crayons smear wavy chinese vignetting charcoal calligraphy curve chalk grunge pen vintage abstract thin swish loop texture design rough swoosh spiral bold modern swash black graffiti japanese twirl background splash thick border scrawl ai generated