This scatterplot visualizes COVID-19 deaths per 10 million people across Denmark, Norway, and Sweden over time, with each country color-coded and a slider allowing users to scrub through dates. The chart draws trailing paths behind each data point to show temporal progression, and hovering reveals a tooltip with details. Built with D3 v7, it uses `d3.csv` to load data, `d3.group` to organize by country, and `d3.scaleTime`/`d3.scaleLinear` for axes, with SVG circles for points and an HTML range input for animation.