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Description
Sixteen yellow balls slide along a loopy trig curve. At each one, parts of the tangent line and 'osculating circle of curvature' are shown. The yellow-green tubes are tangent straws, and the blue ones are oscu-circle arcs! They are pushed along the curve by a mysterious force. Maybe they think they're blood cells or something.

Description
Sixteen yellow balls slide along a loopy trig curve. At each one, parts of the tangent line and 'osculating circle of curvature' are shown. The yellow-green tubes are tangent straws, and the blue ones are oscu-circle arcs! They are pushed along the curve by a mysterious force. Maybe they think they're blood cells or something.