int sw1 = 23;
int sw2 = 22 ;
int relay1 = 21;
int relay2 = 19;
int value1= 0 ;
int value2 = 0 ;
void setup() {
  Serial.begin(9600);
  pinMode(sw1, INPUT_PULLUP );
  pinMode(sw2, INPUT_PULLUP );
  pinMode(relay1, OUTPUT );
  pinMode(relay2, OUTPUT );
}
void loop() {
  value1 = digitalRead(sw1);
  value2 = digitalRead(sw2);

  if (value1 == 0 && value2 == 1 ) {
    digitalWrite(relay1, 1);
    digitalWrite(relay2, 0);
  } else if (value2  == 0 && value1== 1) {
    digitalWrite(relay1, 0);
    digitalWrite(relay2, 1);
  } else 
    digitalWrite(relay1, 0);
    digitalWrite(relay2, 0);
  }