// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
   digitalWrite(7, HIGH);  
  delay(2000);                      
  digitalWrite(7, LOW); 
  delay(2000);  
  digitalWrite(13, HIGH);  
  delay(1000);                      
  digitalWrite(13, LOW); 
  delay(1000); 
   digitalWrite(12, HIGH);  
  delay(1000);                      
  digitalWrite(12, LOW); 
  delay(1000);  
   digitalWrite(11, HIGH);  
  delay(1000);                      
  digitalWrite(11, LOW); 
  delay(1000);                       
}