This example presents a scatterplot matrix (SPLOM) of four quantitative measurements from the Palmer Penguins dataset, with points colored by species. A global interval selection brush, defined via a Vega-Lite `params` declaration, links all subplots, so brushing any one cell highlights the corresponding points across every panel by enlarging and brightening them. The visualization is built with Vega-Lite 5, embedded through vega-embed, using a repeated specification (`repeat`) to generate the 4×4 grid of small 140×140-pixel charts.