the light is changing by the frequency of the music or normal voice .
so i used the sound sensor to can convert the sound to value it can read in Arduino.
the ouput it can changing like you want for me i just used some leds so you can make a ( fountain and the water changing by the frequency and advice from me put some leds and light to make it pretty )
Step 1: The Components
Step 2: Block Digram
the input be the physical signal ( the sound ) and the output light or movement like Robert dancing :)
Step 3: Programming
i use Arduino program.
and i use a library to can calculate the input signal the library call (FFT)
Step 4: The Last Step
as shown in photo and video the lights is changing coz the music have different frequency.