void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
pinMode(10, OUTPUT);
pinMode(9, OUTPUT);
pinMode(8, OUTPUT);
pinMode(7, OUTPUT);
pinMode(6, OUTPUT);
pinMode(5, OUTPUT);
pinMode(4, OUTPUT);
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 digitalWrite(11, HIGH); digitalWrite(10, HIGH); 
 digitalWrite(7, HIGH); digitalWrite(2, HIGH);
 delay(3000);
digitalWrite(11, LOW);
delay(3000);

digitalWrite(12, HIGH); digitalWrite(9, HIGH);
delay(3000);
digitalWrite(12, LOW); digitalWrite(9, LOW); digitalWrite(10, LOW);
delay(3000);

digitalWrite(13, HIGH); digitalWrite(8, HIGH);
delay(3000);
 digitalWrite(8, LOW);  digitalWrite(9, LOW); 
delay(3000);

digitalWrite(9, HIGH); digitalWrite(6, HIGH);
delay(3000);
 digitalWrite(6, LOW); digitalWrite(9, LOW); 
delay(3000);

digitalWrite(8, HIGH); digitalWrite(10, HIGH);
delay(3000);
digitalWrite(8, LOW); digitalWrite(10, LOW); 
delay(3000);
}