// Pins used
const int Ain1Pin             = 7;
const int Ain2Pin             = 8;
const int PwmAPin             = 9;
const int Bin1Pin             = 4;
const int Bin2Pin             = 5;
const int PwmBPin             = 6;


void setup(){

    // Configure the pins
    // For the motor to move forward:  pin 1 = HIGH and pin 2 = LOW
    // For the motor to move backward: pin 1 = LOW  and pin 2 = HIGH
    // For the motor to stop or break: pin 1 = LOW  and pin 2 = LOW
    // The PWM pin determines the speed of the motor
    pinMode(Ain1Pin, OUTPUT);
    pinMode(Ain2Pin, OUTPUT);
    pinMode(PwmAPin, OUTPUT);
    pinMode(Bin1Pin, OUTPUT);
    pinMode(Bin2Pin, OUTPUT);
    pinMode(PwmBPin, OUTPUT);
}



void loop() {

    delay(2000);

    // Move motor A forward at full speed
    digitalWrite(Ain1Pin, LOW);
    digitalWrite(Ain2Pin, HIGH);
    analogWrite(PwmAPin, 255);

    // Move motor B forward at full speed
    digitalWrite(Bin1Pin, LOW);
    digitalWrite(Bin2Pin, HIGH);
    analogWrite(PwmBPin, 255);

    delay(2000);

    // Move motor A forward at half speed
    digitalWrite(Ain1Pin, LOW);
    digitalWrite(Ain2Pin, HIGH);
    analogWrite(PwmAPin, 123);

    // Move motor B backward at full speed
    digitalWrite(Bin1Pin, HIGH);
    digitalWrite(Bin2Pin, LOW);
    analogWrite(PwmBPin, 255);

    delay(2000);

    // Move motor A backward at half speed
    digitalWrite(Ain1Pin, HIGH);
    digitalWrite(Ain2Pin, LOW);
    analogWrite(PwmAPin, 123);

    // Stop motor B
    digitalWrite(Bin1Pin, LOW);
    digitalWrite(Bin2Pin, LOW);
    analogWrite(PwmBPin, 0);

    delay(2000);

    // Stop motor A
    digitalWrite(Ain1Pin, LOW);
    digitalWrite(Ain2Pin, LOW);
    analogWrite(PwmAPin, 0);

    // Move motor B forward at half speed
    digitalWrite(Bin1Pin, LOW);
    digitalWrite(Bin2Pin, HIGH);
    analogWrite(PwmBPin, 123);

}

void brake () {
// Stop motor A
    digitalWrite(Ain1Pin, LOW);
    digitalWrite(Ain2Pin, LOW);
    analogWrite(PwmAPin, 0);

// Stop motor B
    digitalWrite(Ain1Pin, LOW);
    digitalWrite(Ain2Pin, LOW);
    analogWrite(PwmBPin, 0);

}

void forward () {
  // Go motor A
    digitalWrite(Ain1Pin, LOW);
    digitalWrite(Ain2Pin, HIGH);
    analogWrite(PwmAPin, 255);

  // Go motor B
    digitalWrite(Ain1Pin, LOW);
    digitalWrite(Ain2Pin, HIGH);
    analogWrite(PwmBPin, 255);
}

void back () {
  // back motor A
    digitalWrite(Ain1Pin, HIGH);
    digitalWrite(Ain2Pin, LOW);
    analogWrite(PwmAPin, 255);

  // back motor B
    digitalWrite(Ain1Pin, HIGH);
    digitalWrite(Ain2Pin, LOW);
    analogWrite(PwmBPin, 255);

char Incoming_value = 0;

  Incoming_value = Serial.read();      //Read the incoming data and store it into variable Incoming_value
    Serial.print(Incoming_value);        //Print Value of Incoming_value in Serial monitor
    Serial.print("\n");        //New line
}