This is the same technique as is used for these animations in which a number of spinning circles or pointers magically draws a more or less complicated shape.

This is the same technique as is used for these animations in which a number of spinning circles or pointers magically draws a more or less complicated shape. You can read about it here as well: https://alex.miller.im/posts/fourier-series-spinning-circles-visualization/ https://alex.miller.im/posts/fourier-series-spinning-circles...