/*

boolean L=1;
void setup() {
  // put your setup code here, to run once:
for (int k=0; k<8; k++)
{pinMode(k+4, OUTPUT);}
}

void loop() {
  // put your main code here, to run repeatedly:
for (int b=0; b<8; b++)
{digitalWrite(b+4, L); delay(500);
digitalWrite(b+4, !L); delay(500);
//L=!L;
}
}
*/

//ahora del ultimo al primero
//tarea
boolean L=1;
void setup() {
  // put your setup code here, to run once:
for (int k=11; k>3; k--)
{pinMode(k, OUTPUT);}
}

void loop() {
  // put your main code here, to run repeatedly:
for (int b=11; b>3; b--)
{digitalWrite(b, L); delay(500);
digitalWrite(b, !L); delay(500);
//L=!L;
}
}