#include <SoftwareSerial.h>

SoftwareSerial mySerial(4, 5); // RX, TX

void setup()
{
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  digitalWrite(11, HIGH);
  digitalWrite(8, HIGH);    
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  Serial.println("Goodnight moon!");

  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
  mySerial.println("Hello, world?");
}

void loop() // run over and over
{
  int inByte;
  if (mySerial.available())
  {
    inByte= mySerial.read();
    Serial.write(inByte);
    if(inByte==65)//forward
    {
       Serial.println(inByte); 
      digitalWrite(13, HIGH);   
      digitalWrite(12, LOW);
      
      digitalWrite(9, HIGH);   
      digitalWrite(10, LOW);
    }
    if(inByte=='B')//Backword
    {
      Serial.println(inByte);  
      digitalWrite(13, LOW);   
      digitalWrite(12, HIGH);
      
      digitalWrite(9, LOW);   
      digitalWrite(10, HIGH);
    }
    if(inByte=='C')//left
    {
        
      digitalWrite(13, LOW);   
      digitalWrite(12, HIGH);
      
      digitalWrite(9, HIGH);   
      digitalWrite(10, LOW);
    }
    if(inByte=='D')//right
    {
        
      digitalWrite(13, HIGH);   
      digitalWrite(12, LOW);
      
      digitalWrite(9, LOW);   
      digitalWrite(10, HIGH);
    }
    if(inByte=='E')//brake or stop
    {
        
      digitalWrite(13, HIGH);   
      digitalWrite(12, HIGH);
      
      digitalWrite(9, HIGH);   
      digitalWrite(10, HIGH);
    }
  }   
}