A reusable scatter plot displays the relationship between calorie intake and protein intake from a fitness progress dataset, with animated points transitioning from the center and color-coded by a continuous scale. Built with D3 v7, the visualization uses a modular `scatterPlot` function that constructs linear scales, axes, and a color legend. The SVG rendering includes styled circles with hover effects, while CSS handles transitions, and data is loaded via `d3.csv` from a GitHub-hosted source.