Thus the angle of the plate reverses and the clock hands move forward between one and four times every minute. On versions of the clock with a dial to indicate seconds, the second hand jumps forward either 15 or 30 seconds on each oscillation depending on the length of the track.
Therefore, the plate's angle flips, and the clock hands advance between one to four times per minute. On versions of the clock featuring a second-hand indicator, the second hand skips either 15 or 30 seconds with each oscillation based on track length.