void setup() {
  pinMode(1,OUTPUT );
    pinMode(2,OUTPUT );
      pinMode(3,OUTPUT );
        pinMode(4,OUTPUT );
          pinMode(5,OUTPUT );
            pinMode(6,OUTPUT );
              pinMode(7,OUTPUT );
                pinMode(8,OUTPUT );
}

void loop() {
  digitalWrite(1,HIGH );
  delay(1000);
    digitalWrite(1,LOW  );
        digitalWrite(2,HIGH );
          delay(1000);
            digitalWrite(2, LOW  );
                digitalWrite(3,HIGH );
                  delay(1000);
                    digitalWrite(3,LOW );
                        digitalWrite(4,HIGH );
                          delay(1000);
                            digitalWrite (4,LOW );
                                digitalWrite(5,HIGH );
                                  delay(1000);
                                    digitalWrite(5,LOW  );
                                        digitalWrite(6,HIGH );
                                          delay(1000);
                                            digitalWrite(6,LOW );
                                                digitalWrite(7,HIGH );
                                                  delay(1000);
                                                    digitalWrite(7, LOW );
                                                      digitalWrite(8,HIGH );  
                                                      delay(1000);
                                                        digitalWrite(8,LOW  );
                                                          delay(1000);                                                         
}