A power factor that governs how quickly the ball radius shrinks. A value of 0 gives all balls the same radius,
a value of 1 makes the radius proportional to the pendulum length.
Length
The length of the pendulum rod, from the suspension point to the centre of the ball.
Angle
The maximum angle from the vertical that the pendulums swing to.
Speed
Sets the speed of the pendulums.
Period
This parameter determines the number of cycles that the whole assembly takes to repeat.
Let the Period = M. In the time that it takes for the first (ie the longest) pendulum to
do M cycles, the next pendulum will do M+1 cycles, the next pendulum will do M+2 cycles, etc.
Frame delay
The time delay in milliseconds between animation frames.