#define LED_1_PIN 11
#define LED_2_PIN 10
#define LED_3_PIN 9
#define BUTTON_PIN 4
void setup()
{
  pinMode(LED_1_PIN, OUTPUT);
  pinMode(LED_2_PIN, OUTPUT);
  pinMode(LED_3_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}
void loop()
{
  byte buttonState = digitalRead(BUTTON_PIN);
  
  if (buttonState == LOW) {
    digitalWrite(LED_1_PIN, HIGH);
    digitalWrite(LED_2_PIN, HIGH);
    digitalWrite(LED_3_PIN, HIGH);
  }
  else {
    digitalWrite(LED_1_PIN, LOW);
    digitalWrite(LED_2_PIN, LOW);
    digitalWrite(LED_3_PIN, LOW);
  }
}