Beautiful seamless background with monochrome black and white flowers. Hand-drawn contour lines and strokes. 用单色的黑色和白色鲜花的美丽无缝背景。手绘轮廓线和中风。手绘轮廓线和中风。完美的背景贺卡和请柬到一天的婚礼，生日，瓦伦丁