water color black and white thick brushstrokes hand-drawn lines, winding, loopy, criss-crossingseamless pattern background

ripple marine sea ornament nautical element set thick rough repeat art shape decorative wavy curve wave curly bold organic wallpaper brushstroke sketch scribble stroke black ink hand vector line background brush drawn paint abstract retro texture grunge graphic design modern pattern geometric seamless stripe white simple doodle monochrome print smear