Machine Paradox

Why is this a paradox? - You have to imagine how the sails are going to turn.  If the first sail is still then the second sail will move but when this happens the first sail moves so it is not still anymore and because it is not still, the second sail will stop moving and because it has stopped moving, the first sail will stop moving  and if the first sail is still so the second sail will move again and so on and so forth
Why is this of any importance? - I don't know if it is but I think its a pretty and interesting paradox and the first paradox I've seen about mechanical movement. I was inspired by the way the Liar Paradox flips back and forth between true and false like a moving part and I wondered if one could build an 'intellectual machine' that was powered by a paradox.