motor inegrador 2

int motor[] = {3, 4, 5, 6, 7, 8};
int maI = 4;
int maII = 5;
int vela = 3;

void setup() {
  // put your setup code here, to run once:
  for(int i = 0; i<6; i++){
    pinMode(motor[i], OUTPUT);
  }

}

void loop() {
  // put your main code here, to run repeatedly:
  void frente();
  void trás();
}
void frente(){
  digitalWrite(maI, 1);
  digitalWrite(maII, 0);
  analogWrite(vela,200);
  delay(500);
}
void tras(){
  digitalWrite(maI, 0);
  digitalWrite(maII, 1);
  analogWrite(vela,200);
  delay(500);
}