This example visualizes a dataset of 88 (x, y) points—reminiscent of piano keys—by drawing a smooth Catmull-Rom spline through them in SVG. It uses a JavaScript implementation of the spline with adjustable parametrization (uniform, centripetal, or chordal) to compute Bézier control points. The chart displays red input-point paths, blue spline points with interactive hover highlighting, and a side panel listing values for each point, rendered via native DOM and SVG APIs.