A fork of D3 Starter shows a dynamic scatterplot of beige circles undulating across a dark SVG canvas. The circles’ vertical positions follow a sine wave, while their count fluctuates over time. Using D3 v7, the code employs `select`, `range`, and `join` to bind data and update circle attributes on a setInterval, with `easeLinear` imported but unused. The animation runs continuously, updating every 100 milliseconds.