Look at the rotation of the gaint wheel. Every compartment moves to a position and comes back to the original position.
A clock shows time by the rotation of minute hand and hour hand.
The minute hand and hour hand of a clock form an angle.
Observe the various angle formed by the rotation of the hands of the clock.
You can note that from 12.00 midnight to 12 noon the hour hand of the clock has completed one rotation. That is, it has completed 360° once. While the minute hand has completed 12 rotations. That is, it has completed 360° twelve times.