D3 js part 2

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Last edited Dec 19, 2023

Created on Dec 19, 2023

A looping animation of circles moves vertically in a sine-wave pattern across an SVG canvas, with the number of circles oscillating between five and fifteen over time. The code uses D3 v7's `select`, `range`, and the data-join method `.join('circle')` to bind array data to SVG elements, updating their `cx` and `cy` attributes each frame via a `setInterval` callback. The visualization highlights D3's declarative enter-update-exit pattern for dynamic datasets.

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A bare minimum HTML page demonstrating use of CSS and JavaScript.

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