A dark, inverted basemap serves as the backdrop for a firefly-style visualization of confirmed coronavirus case locations. Each location with at least one case is rendered as a glowing, semi-transparent circular sprite on an OpenLayers map, with size and intensity kept constant regardless of case count. The map is built with React and uses d3.csv to load Johns Hopkins COVID-19 time-series data, while custom canvas-generated sprites with radial gradients create the glow effect. OpenLayers layers and vector sources manage the points, with a Stamen toner-lite tile layer inverted via CSS for the dark aesthetic.