If I may, I'd recommend to use a seeded RNG so that your pin colors remain stable on every rotation change: ``` randomItem = { controls; // invalidate this cell on every rerender const rng = d3.randomLcg(1); return array => array[Math.floor(rng() * array.length)]; } ``` Alternatively you could cycle through the colors in your caps cell, e.g. ```` .map((d, i) => ({/* ... */ color: pinColors[i % pinColors.length] }) ```

Thank you! I'm still learning and I love Observable. I'm such huge fan.