void setup() {
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(6, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:

  digitalWrite(12,HIGH);
  delay(1000);
  digitalWrite(12,LOW);
  delay(500);
  digitalWrite(13, HIGH);
  delay(1000);
  
  digitalWrite(13, LOW);
  delay(400);


  digitalWrite(7,HIGH);
  delay(1000);
  
  digitalWrite(7, LOW);
  delay(300);

  digitalWrite(6,HIGH);
  delay(1000);
 
  digitalWrite(6, LOW);
  delay(200);

}