date: 20120415 Points to places ...a little science pendulum/spring play... [ prerequisite: the Processing programming environment - http://processing.org/download ] [ usage: press somewhere on screen to restart the circle locations. check the Processing file for more extensive explanations of the keyboard commands. quick tip: try the following keys: 1,2,3,s,S,alt,up,down,left,right ] a little Processing sketch where there are some circles that are attached to points (the destination points here), by an elastic 'string'. initially there's no drag or resistance, so the circles move around the destination points like a perpetual pendulum. also initially the size of the circle is a reflection of their velocity. the faster they move, the larger they become.