#define BUTTON1_PIN 2  
#define BUTTON2_PIN 4  

#define led_PIN  5
#define relay_PIN  18

void setup() {
  Serial.begin(9600);                
  pinMode(BUTTON1_PIN, INPUT_PULLUP); 
  pinMode(BUTTON2_PIN, INPUT_PULLUP); 
  pinMode(led_PIN, OUTPUT);   
  pinMode(relay_PIN, OUTPUT);     
}

void loop() {
  int buttonState1 = digitalRead(BUTTON1_PIN); 
  int buttonState2 = digitalRead(BUTTON2_PIN); 

  if (buttonState1 == LOW) {
    Serial.println("The button is on");
    digitalWrite(led_PIN, HIGH); // turn on
    digitalWrite(relay_PIN, HIGH); // turn on
    
  } 
  else if (buttonState2 == LOW) {
    Serial.println("The button is off");
    digitalWrite(led_PIN, LOW);  // turn off
    digitalWrite(relay_PIN, LOW); // turn on
      }
}