int analogPin = 0;
int val = 0;


void setup() {
  Serial.begin(9600);
  pinMode(13, OUTPUT);


}

void loop() {
  val = analogRead(analogPin);
  Serial.println(val);

  if(val < 100) {
  digitalWrite(13, HIGH);
 }
 else {
   digitalWrite(13, LOW);
 }
  

}