Creation of this applet was inspired by a [url=https://twitter.com/CutTheKnotMath/status/840618688457904128]tweet[/url] from [url=https://twitter.com/CutTheKnotMath]Alexander Bogomolny[/url]. [br][br]Feel free to move any of the [b]big white points[/b] or [b][color=#9900ff]big purple points[/color][/b] anywhere you'd like at any time.