int in1 = 1;
int in2 = 2;
int en = 3;

void setup() {
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(en, OUTPUT);
}

void loop() {
  digitalWrite(in1, HIGH);
  digitalWrite(in1, LOW);

  analogWrite(en, 255);
  delay(1000);
}


// OUTPUT 1 - Positive DC Motor
// OUTPUT 2 - Positive DC Motor
// INPUT 1 - Digital Pin
// INPUT 2 - Digital Pin 
// En1 - PWM Pin
// GND, 12V - DC Batter Connect