void setup() {
  // put your setup code here, to run once:
pinMode(8, INPUT_PULLUP);
pinMode(9, INPUT_PULLUP);
pinMode(10, INPUT_PULLUP);
pinMode(13, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if (digitalRead(10) == LOW){
  digitalWrite(13, HIGH);
  
}
if (digitalRead(9) == LOW){
  digitalWrite(13, LOW);
  
}
if (digitalRead(8) == LOW){
  for (int i = 0; i < 10; i++){
  digitalWrite(13, HIGH);
  delay(500);
  digitalWrite(13, LOW);
  delay(500);
  }
} 

}