>> Go on then, what's the mathematics behind this one?  Gravity?
> 
> Well, I don't know about "gravity"... merely the damped oscilations of a 
> particle attracted to the center of the image.

I should perhaps point out that the RED trace is the path of the 
particle. The GREEN path is the object's velocity, and the BLUE path is 
the object's acceleration.

...which means that there's no real way to correlate the three traces to 
each other, which is kind of useless. Oh well!

> Now, if you add more than one attractor.....

...it goes completely scatty! o_O

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