void setup() {
  Serial.begin(115200);
  pinMode(13,OUTPUT);
  pinMode(12,OUTPUT);
  pinMode(14,OUTPUT);
  pinMode(15,OUTPUT);
  pinMode(2,OUTPUT);
  pinMode(4, OUTPUT);
}

void loop() {
  int switch1=digitalRead(4);
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13, LOW);
  delay(1000);
  digitalWrite(12, HIGH);
  digitalWrite(2, HIGH);
  delay(1000);
  digitalWrite(12, LOW);
  digitalWrite(2, LOW);
  delay(1000);
  digitalWrite(14, HIGH);
  digitalWrite(15, HIGH);
  delay(1000);
  digitalWrite(14, LOW);
  digitalWrite(15, LOW);
  delay(1000);

}