cartoons created from scribbles

i have been looking at how my paintings could possibly rotate. these are a few methods i looked into:
 i wanted to find something that rotated slowly enough for people to see and appreciate the cartoons and discoveries. 

3. Gears

The number of teeth in these gears are 15 and 30, respectively. If the 15-tooth gear is the driving gear and the 30-teeth gear is the driven gear, their velocity ratio is 2.
An example of a set of gears is in mechanisms/gear10.30.sim.

3.2 Ordinary gear trains

Gear trains consist of two or more gears that transmit motion from one axis to another. Ordinary gear trains have axes, relative to the frame, for all gears comprising the train.

4.1 Ratchet mechanism

A wheel with suitably shaped teeth, receiving an intermittent circular motion from an oscillating member, is a ratchet wheel. The figure below shows a simple ratchet mechanism.





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