void setup() {
  // put your setup code here, to run once:
pinMode(12, OUTPUT);
pinMode(11, INPUT);
pinMode(10, OUTPUT);
pinMode(15, INPUT);
pinMode(8, OUTPUT);
pinMode(21, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(11) == HIGH){
  digitalWrite(13,HIGH);
}
}