void setup() {
  // put your setup code here, to run once:
 pinMode(3, INPUT);
 pinMode(4, OUTPUT);
 pinMode(5, OUTPUT);
 pinMode(8, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 int sw3=digitalRead(3);
 int sw8=digitalRead(8);
 if (sw8==HIGH){
     for (int A=0;A<2;A++){
      digitalWrite(4, LOW);
      digitalWrite(5, LOW);
      delay(500);
      digitalWrite(4, LOW);
      digitalWrite(5, HIGH);
      delay(500);
    }
  }
 else if (sw3==HIGH){
   for (int B=0;B<2;B++){
     digitalWrite(4, LOW);
     digitalWrite(5, LOW);
     delay(500);
     digitalWrite(4, HIGH);
     digitalWrite(5, LOW);
     delay(500);
    }
    digitalWrite(4, LOW);
    delay(500);
    digitalWrite(5, HIGH);
    delay(500);
  }
 else (sw8==LOW&&sw3==LOW);{
   digitalWrite(4, HIGH);
   digitalWrite(5, HIGH);
   delay(500);
  }
}