What computing platform was designed to a beginner create interactive objects that receive input from sensors and use that input to control lights, motors, and other physical objects?

The answer is Arduino.  It is the computing platform which was designed to help a beginner create interactive objects that receive input from sensors and use that input to control lights, motors, and other physical objects.  It can be used to develop stand-alone interactive objects or can be connected to software on your computer.

i don’t know what it is

Rhythm  in music is characterized by a repeating sequence.