This example shows a line chart of temperature readings over time, with two day patterns displayed as individual data points. The chart includes labeled axes, grid lines, and a title. The code uses D3 v5 with `scaleTime` and `scaleLinear` to map data, `axisLeft` and `axisBottom` to create axes, and `csv` to load the temperature data from a local file. SVG circles are used for each point, with a timestamp parsed into a JavaScript `Date` object.