void setup() {
pinMode (2, INPUT_PULLUP);
pinMode (3, INPUT_PULLUP);
pinMode (4, INPUT_PULLUP);
pinMode (5, INPUT_PULLUP);
pinMode (13, OUTPUT);
pinMode (12, OUTPUT);
pinMode (11, OUTPUT);
pinMode (10, OUTPUT);
}

void loop() {
if(digitalRead(2) == LOW){
  digitalWrite(10, HIGH);
  delay(2000);
  digitalWrite(10, LOW);
  delay (3000);
  }

else if (digitalRead(3) == LOW){
  digitalWrite(11, HIGH);
  delay(1000);
  digitalWrite(11, LOW);
  delay (2000);
}

else if (digitalRead(4) == LOW){
  digitalWrite(12, HIGH);
  delay(1000);
  digitalWrite(12, LOW);
  delay (2000);
}

else if (digitalRead(5) == LOW){
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13, LOW);
  delay (2000);
}

else {

}
}