Two circles with same radii, two points moving on them.[br]The point on the upper circle moves with a speed which is the given fraction of the speed of the point on the other circle.[br]Start the animation to see the fraction pattern ([i]Avvia Animazione[/i] button)[br]Stop the animation and insert a new fraction.[br]Delete traces and restore settings before starting a new animation. ([i]Condizioni iniziali[/i] button)[br][br]Inspired by an interesting [url=https://www.ted.com/talks/roger_antonsen_math_is_the_hidden_secret_to_understanding_the_world#t-562112]Ted[/url] by Roger Antonsen.[br]