This example displays a static SVG canvas with a single instructional text message, “Edit the code below to change me!”, rendered in monospace. The page also defines a JavaScript helper function that checks whether a value exists in an array, logging the result to the console. Built with D3 v4, the code appends an SVG element to the body using `d3.select` and `append`, setting its width and height. The text is positioned with explicit `x` and `y` attributes, and the overall structure is a minimal starter template from Blockbuilder.