void setup() {
  // put your setup code here, to run once:

  // pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  
  // digitalWrite(10, HIGH);



}

void loop() {
  // put your main code here, to run repeatedly:

   digitalWrite(9, 0);
   delay(1000);
   digitalWrite(9, 1);
   delay(1000);
    

}