int led1 = 3;
int led2 = 2;
int button = 4;
int RELAY = 5;
void setup() {
  // put your setup code here, to run once:
  pinMode (led1, OUTPUT) ;
  pinMode (led2, OUTPUT) ;
  pinMode(button, INPUT);
  pinMode(RELAY, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 if(digitalRead(button)==HIGH){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(RELAY, HIGH);
 }else{
    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);
    digitalWrite(RELAY, LOW);
 }
}