scott wrote:
>> ...and now *with* the attachment I meant to add the first time...
> 
> 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.

If the force applied is proportional to the distance, you tend to can 
spirals and sometimes stars. If the force is inversely proportional to 
distance (e.g., inverse square), you get loops.

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

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