Animated dots and connecting lines form a flowing, wave-like pattern across the screen. The visualization uses D3 v6's `selectAll` and `join` methods to continuously update SVG circles and lines at 60 frames per second. Data is generated procedurally via `makeData`, producing a variable number of points whose x, y, and radius values oscillate sinusoidally. The lines connect each point to its predecessor, with stroke width scaled to the current dot radius, creating a dynamic, undulating network.