This Geometry Nodes setup provides a visual demonstration of Fourier series principles by combining rotating unit vectors to generate wave patterns. Users can adjust the number of interacting circles and modify the paths they generate. The package includes several variations, ranging from a basic conceptual demonstration to more advanced examples that feature vertical displacement and multiple vectors. The node trees are intentionally kept clean and fully expanded without nested groups, accompanied by detailed text explanations to help users study the underlying mathematical logic. The setups are optimized for Eevee viewport animation rendering.