Instruction : https://wp.nyu.edu/shanghai-ima-interaction-lab/recitation-7-neopixel-music-visualizer/ I built the circuit just as what we did in the lecture and My led could not blink after the sample code uploaded. I asked an LA and it worked. Then I downloaded the SerialRecord liberary and the Arduino Sample code. After reading the code and the instruction, I understood that the board will receive four parameters from the Serial and change the LED's state accordingly. So I can change the LED if I input the data correctly in Serial. Then I downloaded the SerialRecorder … [Read more...] about Recitation7: Documentation