In my city a lot of new crosswalks have white stripes on a bright yellow background, a lot of them with blinking LEDs. In several places even the sign has a flashing light. Nobody will stop on an ordinary zebra crossing anymore, it doesn't even register. As for the interesting patterns to draw attention, they tried it in a different town in my country near a school, painted the stripes with different colors. Didn't last, police says not according to road regulations. And then someone brought up the famous zebra crossing in the capital near the zoo, where the pattern was realistic zebra stripes. That was promptly repainted as well.
