byte i;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
 pinMode(13, OUTPUT);
 pinMode(12, OUTPUT);
 
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(analogRead(4));
  
 if(analogRead(4)<100){

 
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  delay(1000);
  digitalWrite(12, LOW);
 
 }
 
 delay(100);
  
}