int sensor1 = 0;
int sensor2 = 0;
int incoming = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  pinMode(3, OUTPUT);
}

void loop() {
  sensor1 = analogRead(A0);
  sensor2 = analogRead(A1);

  Serial.print(sensor1);
  Serial.print(",");
  Serial.println(sensor2);

  if (Serial.available()) {
    incoming = Serial.read();
    analogWrite(3, incoming);
  }
}