A pendulum is an old device
A weighted bob attached to a string
Pull the weight off to the side
And release to start the swing
Gravity has no favorite
pulling both from left or right
momentum keeps the bob in play
simplicity outright
you might favor a rightward swing
and you may just get your way
what went left a day before
without a doubt will come
the other way
Oscillation goes from one extreme
To the other t…