int analogPin = A0;
  int val = 0;

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(12, OUTPUT);
  Serial.begin(115200);

}

// the loop function runs over and over again forever
void loop() {
  val = analogRead(analogPin);
  Serial.println(val);
  digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(12, HIGH);
  delay(200);                      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
  digitalWrite(12, LOW);
  delay(200);                      // wait for a second
}