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This example renders four circles in an SVG, positioned diagonally according to a hardcoded data array of integers. The visualization demonstrates basic D3 v7 workflow, using `d3.select` to access the SVG element and the `.data()` and `.enter()` methods to create circles from the array. Each circle’s center is offset by 10 times its data value along both the x- and y-axes, with a fixed radius of 40. The code relies on the D3 library loaded via a CDN, with the `bundle.js` file containing the custom JavaScript logic. The page itself has a large 13em font-size style, though it does not affect the graphic output.