Two colorful cartoon faces, one circular and one rectangular, animate through angry expressions on an SVG canvas. The circular blue face turns red while its eyes shrink, eyebrows rotate, and mouth expands; the yellow face becomes green with rotating eyebrows and flipping mouth. Built with D3 v5, the visualization uses chained transitions with varying durations to animate shapes, positions, and rotations. The code imports custom modules and relies on D3's selection and transition methods to coordinate the parallel animations across both faces.