void setup() {
  // put your setup code here, to run once:
pinMode(2, INPUT_PULLUP);
pinMode(3, INPUT_PULLUP);
pinMode(4, INPUT_PULLUP);
pinMode(5, INPUT_PULLUP);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if (digitalRead(2)== LOW){
digitalWrite(10, HIGH);
delay(5000);
digitalWrite(10, LOW);
delay(3000);
}
else if (digitalRead(3)== LOW){
digitalWrite(11, HIGH);
delay(5000);
digitalWrite(11, LOW);
delay(3000);
}
else if (digitalRead(4)== LOW){
digitalWrite(12, HIGH);
delay(5000);
digitalWrite(12, LOW);
delay(3000);
}
else if (digitalRead(5)== LOW){
digitalWrite(13, HIGH);
delay(5000);
digitalWrite(13, LOW);
delay(3000);
}
}