void setup() {
pinMode(2 , OUTPUT); 
pinMode(3 , OUTPUT); 
pinMode(4 , OUTPUT); 
pinMode(5 , OUTPUT); 
pinMode(6 , OUTPUT); 
pinMode(7 , OUTPUT); 
pinMode(8 , OUTPUT); 
pinMode(9 , OUTPUT); 
pinMode(10 ,OUTPUT); 
pinMode(11 , OUTPUT);
pinMode(12 , OUTPUT);
pinMode(13 , OUTPUT); 
}

void loop() {
digitalWrite(4, HIGH);
digitalWrite(11, HIGH);
digitalWrite(8, HIGH);
digitalWrite(5, HIGH);
delay(5000);
digitalWrite(8, LOW);
digitalWrite(5, LOW);
digitalWrite(6, HIGH);
digitalWrite(9, HIGH);
delay(2000);
digitalWrite(6,LOW);
digitalWrite(9, LOW);
digitalWrite(4, LOW);
digitalWrite(11, LOW);
digitalWrite(2,HIGH);
digitalWrite(13, HIGH);
digitalWrite(10, HIGH);
digitalWrite(7, HIGH);
delay(5000);
digitalWrite(2, LOW);
digitalWrite(13, LOW);
digitalWrite(3, HIGH);
digitalWrite(12, HIGH);
delay(2000);
digitalWrite(3, LOW);
digitalWrite(12, LOW);
digitalWrite(10, LOW);
digitalWrite(7, LOW);
}