void setup() {
  // put your setup code here, to run once:
pinMode(12, OUTPUT);
pinMode(2, INPUT_PULLUP);
pinMode(11, OUTPUT);
pinMode(13, OUTPUT);
pinMode(4, OUTPUT);
Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
int x = digitalRead(2);
if (x==0)
{
  digitalWrite(12, HIGH);
  digitalWrite(11, HIGH);
  digitalWrite(13, HIGH);
  digitalWrite(4, HIGH);
  delay(1000);
  Serial.println("Switch ON ,LED ON");

}
else
{
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  digitalWrite(13, LOW);
  digitalWrite(4, HIGH);
  delay(1000);
  Serial.println("Switch OFF , LED OFF");
}
}