The instrument I created involves two LED lights that are turned on by pressing buttons "a" and "b". When button "a" is pressed, the blue light turns on and when button "b" is pressed, the blue light turns off and the green light turns on.The sound of the instrument changes as the breadboard is moved back and forth. When the instrument is horizontal, you will hear one beat but when the instrument is vertical, you will hear two beats. The LED lights don't play according to the beats. They are there for you to use them according to the beat.