int IN1 = 2; 
int IN2 = 4;
int IN3 = 7;
int IN4 = 6;
int ENA = 5;
int ENB = 10;

void setup() {
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);
  pinMode(ENA, OUTPUT);
  pinMode(ENB, OUTPUT);
}

void loop() {
  // ADELANTE — LED verde + azul encendidos
  analogWrite(ENA, 255);
  analogWrite(ENB, 255);
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, HIGH);
  digitalWrite(IN4, LOW);
  delay(2000);

  // STOP — todos apagados
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
  delay(1000);

  // REVERSA — LED rojo + amarillo encendidos
  analogWrite(ENA, 255);
  analogWrite(ENB, 255);
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, HIGH);
  delay(2000);

  // STOP
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
  delay(1000);

  // GIRO IZQUIERDA — LED rojo + azul
  analogWrite(ENA, 200);
  analogWrite(ENB, 200);
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  digitalWrite(IN3, HIGH);
  digitalWrite(IN4, LOW);
  delay(2000);

  // STOP
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
  delay(1000);

  // GIRO DERECHA — LED verde + amarillo
  analogWrite(ENA, 200);
  analogWrite(ENB, 200);
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, HIGH);
  delay(2000);

  // STOP
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
  delay(1000);
}