This interactive Gapminder-style visualization animates the relationship between GDP per capita (log-scaled on the x-axis) and life expectancy (y-axis) across countries from 1960 to 2005, with circle size encoding population. Countries are colored by region using a categorical palette. A play button and year slider let users scrub through time, triggering smooth transitions of the circles as the data updates. Built with D3 v4, it renders as an SVG animation with hover tooltips that display country details. The visualization is forked from almccon's gapminder demo and color variants, adding interactivity to the classic animated scatterplot.