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Last edited Mar 26, 2019

Created on Mar 26, 2019

The visualization animates a grid of square cells that fills and empties to demonstrate count transitions, cycling between zero and a random number up to 9,999. It shows how a dynamic numeric label updates in sync with the cell layout. The code uses D3 v4 with SVG rendering, employing `transition.attr("width", ...)` and `transition.attr("width", 0)` for enter/exit animations, plus a text `tween` with `d3.interpolateNumber` to smoothly change the displayed count. The grid groups cells in blocks of ten, with spacing calculated from the viewport width.

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