Kombinasi LED dan Button Menggunakan Arduino UNO R3

int lampu1 = 13;
int lampu2 = 12;

int switchPin = 11;

int lastButtonState = 0;

void setup()
{
  Serial.begin(9600);

   pinMode(lampu1, OUTPUT);
 pinMode(lampu2, OUTPUT);
 pinMode (switchPin, INPUT);
}

void loop(){

 int buttonState = digitalRead(switchPin);
if (buttonState == 1)
{
  digitalWrite(13,HIGH);
  digitalWrite(12,HIGH);
}
  else {
  digitalWrite(13,LOW);
  digitalWrite(12,LOW);

  }
}