int pinRed = 9;
int pinGreen = 10;
int pinBlue = 11;

int pinMicrophone = A0;

int soundLevel = 0;

void setup() {
  pinMode(pinRed, OUTPUT);
  pinMode(pinGreen, OUTPUT);
  pinMode(pinBlue, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  soundLevel = analogRead(pinMicrophone);
  
  Serial.println(soundLevel);

  if (soundLevel < 200) { 
    analogWrite(pinRed, 0);
    analogWrite(pinGreen, 0);
    analogWrite(pinBlue, 255); 
  }
  else if (soundLevel >= 200 && soundLevel < 500) {
    analogWrite(pinRed, 0);
    analogWrite(pinGreen, 255); 
    analogWrite(pinBlue, 0);
  }
  else { 
    analogWrite(pinRed, 255); 
    analogWrite(pinGreen, 0);
    analogWrite(pinBlue, 0);
  }
  
  delay(100);
}