"Kinetic art" or "kinetics" represents a modern artistic movement of the fine arts, which emerged in Paris in the 1950s.
As its name implies, it determines a vibrant and dynamic art that has movement as its main feature, to the detriment of the static character of painting and sculpture.
One of the greatest examples of kinetic art is the American painter and sculptor Alexander Calder (1898-1976), well known for his “Mobiles” (four-dimensional drawing), a type of sculpture with moving pieces, whether by the action of the winds. or by power motors.
If the musicians are highly skilled then it allows the stranger to come up with a more complex piece, but if they aren’t, then the arranger has to come up with something more simple. the talent directly correlates with the difficulty of the piece :)