int LV01 = 15 ;
int LA01 = 2 ;
int LR01 = 4 ;

int LV02 = 16 ;
int LA02 = 17 ;
int LR02 = 5 ;

int LV03 = 18 ;
int LA03 = 19 ;
int LR03 = 21 ;

int LV04 = 13 ;
int LA04 = 12 ;
int LR04 = 14 ;


void setup() {
 
 pinMode(LV01, OUTPUT);
 pinMode(LA01, OUTPUT);
 pinMode(LR01, OUTPUT);

 pinMode(LV02, OUTPUT);
 pinMode(LA02, OUTPUT);
 pinMode(LR02, OUTPUT);

 pinMode(LV03, OUTPUT);
 pinMode(LA03, OUTPUT);
 pinMode(LR03, OUTPUT);

 pinMode(LV04, OUTPUT);
 pinMode(LA04, OUTPUT);
 pinMode(LR04, OUTPUT);

 digitalWrite(LV01, LOW);
 digitalWrite(LA01, LOW);
 digitalWrite(LR01, HIGH);

  digitalWrite(LV02,LOW);
 digitalWrite(LA02,LOW);
 digitalWrite(LR02,HIGH);

  digitalWrite(LV03,LOW);
 digitalWrite(LA03,LOW);
 digitalWrite(LR03,HIGH);

  digitalWrite(LV04,LOW);
 digitalWrite(LA04,LOW);
 digitalWrite(LR04,HIGH);


}

void loop() {
 
 //// Interseccin 01 ///////////

  digitalWrite(LR01, LOW);
  digitalWrite(LV01, HIGH);
delay(6000);
  digitalWrite(LV01, LOW);

  for (int i=1; i<=8;i++){
    digitalWrite(LA01,!digitalRead(LA01));
    delay(500);
  }
 digitalWrite(LR01, HIGH);

 //// Interseccion 02 ///////////

  digitalWrite(LR02, LOW);
  digitalWrite(LV02, HIGH);
delay(6000);
  digitalWrite(LV02, LOW);

  for (int i=1; i<=8;i++){
    digitalWrite(LA02,!digitalRead(LA02));
    delay(500);
  }
 digitalWrite(LR02, HIGH); 

 //// Interseccion 03 ///////////

  digitalWrite(LR03, LOW);
  digitalWrite(LV03, HIGH);
delay(6000);
  digitalWrite(LV03, LOW);

  for (int i=1; i<=8;i++){
    digitalWrite(LA03,!digitalRead(LA03));
    delay(500);
  }
 digitalWrite(LR03, HIGH); 

  //// Interseccion 04 ///////////

  digitalWrite(LR04, LOW);
  digitalWrite(LV04, HIGH);
delay(6000);
  digitalWrite(LV04, LOW);

  for (int i=1; i<=8;i++){
    digitalWrite(LA04,!digitalRead(LA04));
    delay(500);
  }
 digitalWrite(LR04, HIGH); 
}