Fork of Circles with D3
This example demonstrates how to create and style a set of circles using D3.js. It shows a colorful, abstract composition of seven circles with varying positions, radii, and fill colors, rendered on a light green background. The code uses D3's selection and method chaining API to bind data to SVG circle elements, setting attributes like `cx`, `cy`, `r`, and `fill` via the `.attr` method. The data is defined explicitly in a JavaScript array within the `main` function, which is then joined to the SVG using the `select`, `selectAll`, and `join` pattern.