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1: That's pretty cool.

2: Would be nice if I could pause/slow down the rotation. Can't get the Borromean rings to look like the Ballantine logo. (three interlocking perfect circles.)

http://mathworld.wolfram.com/BorromeanRings.html

Nice! How did you get the equations of the knots? I.e. how did you compute the paths followed in 3-space by the 'strings'?

Those are really cool!