A pattern discovery visualization displays NYPD crime data across 31 offense categories and 10 years (2012–2021) through a multi-series line chart. Clicking the "View SO2" radio button triggers an animated rendering of the dataset. The code uses D3.js v6 to build an SVG visualization, with `d3.format` for number formatting and custom color arrays for series differentiation. The visualization animates through the data via a `black()` function that removes and redraws groups, presenting crime trends as interactive time-series line graphs.